(Spycrab)

(Morta)

(Freddy999M)

(Tortilleli)

(Roxx)

(Spectral)

(Crane)

(Axo Axolote)

(Gh0st)

(Wou)

(Blue_Nines)

“The oldest and strongest emotion of mankind is fear, and the oldest and strongest kind of fear is fear of the unknown.” ― H.P. Lovecraft

The depths of the forest, a mysterious and lonely place, where few souls go in search of adventure or exploration, but, if a tree falls and no one hears it, did it really fall? And more importantly, if you scream in agony in the middle of the forest and no one hears you, did you really scream?

The forest is not a completely empty place, when night falls and people get lost, two mysterious supernatural entities stalk those unfortunate enough to cross their path, and eventually, they will get hooked on a tree branch, but it won't be a branch, it will be one of their fingers.

(By Blue_Nines)

The Slenderman, The virus of the Collective Unconscious that exists thanks to people's thoughts and beliefs.

Siren Head, The Patron Saint of Going Missing With No Trace from the mind of Trevor Henderson.

Today, two of these metaphysical entities that lurk in the distance of the forest in search of victims face each other. Which of the two will emerge victorious from the darkness to reclaim lost souls, and which will become nothing more than a myth of what was once a feared entity? Let's find out on DBE Blogs!

Before We Start…

As many must already know, Slenderman is not a character with a main canon, he is a public domain character and everyone can write or use the character in different projects, so it is difficult to choose what to use in an analysis... or so many believe.

In this Blog, and especially in this specific Matchup, we are going to focus on the main medium of the character, Original Mythos, these myths were written by Victor Surge and SomethingAwful Paranormal Thread. In case you don't know, Victor Surge is the original creator of Slenderman, he is the one who edited the original pictures in SomethingAwful's “Create Paranormal Images” forum, and later, he wrote stories about his character, which we know as Original Mythos, which can be found in the Original Mythos account on Tumblr. Besides that, we're going to use other official stuff, that is, Slender: The Arrival, whose story was written by Victor Surge in 2013 alongside the Marble Hornets cast, Slender The Arrival VR, the VR version of the same game, Slender: The Eight Pages and its REMAKE, being Eight Pages the first official Slenderman game and the second its official remake, these being all official Slenderman video games. and of course... the 2018 movie, where Victor Surge was also involved. So, yeah, sorry to those who wanted a lot more Slenderman content, but we're going to focus on the stuff created by the character's creator, and we don't want a Composite of Web Series and fanmade video games. (More information Before The Verdict)

As for Siren Head, the first thing we need to clarify is that despite popular belief, Siren Head is not a public domain character by any means. Siren Head is created by Trevor Henderson, and the many Trevor Henderson posts on social media and the lore around them is the main canon. Which is referred to as the Trevor Henderson Mythos. Any statement and claim that Trevor makes should be usable, so long as Trevor approves. So Interviews, QNAs and Podcasts are on the table. The team will be finding and researching what they can, but it’s almost guaranteed that we missed some sort of post. Bear with us regarding that, a lot of these posts are lost to time and require a lot of digging to find. Some scans are hard to tell if they're real or fake, but don’t worry, we’ve fact checked just about all of these posts and we’re confident in what we are using. There are other media to go through as well besides social media, like The Mayfair Watcher Society, an audio series that takes place within the Trevor Henderson Mythos. As well as books that Trevor has published, such as the Scarewaves series, The Odd Noises In Empty Rooms and The Only Way Out Is Through which also take place in the same verse.

Finally, this Blog will clearly have sensitive topics, both for the horror and for the graphic images and anecdotes not suitable for all audiences (especially about Slenderman, you will see what we mean), so discretion is suggested.

Somewhere in the forest…

Background

Slenderman

“When you fear me, I love you, when you cower, I draw near to protect you, I will always protect you, I will always watch you. Your blindness is my omniscience, your weakness, my omnipotence. Until the day you die. Until the day you die.”

You are in a forest at night, alone and with no other company than the sounds of crickets and the cool spring breeze, exploring the surroundings to get away from technology, the city and the pressure of society in general, but you don't feel calm as you want, you feel that something is wrong, something very bad is happening, as if you are not alone, as if something is watching you and you don't know it. Suddenly, the breeze stops completely, the crickets and frogs stop sounding, everything becomes absolutely calm and silent, but it's just the calm before the storm.

From between two trees, in the infinite darkness, a person comes out, an incredibly tall and abnormally thin one, wearing a business suit... what is someone in a business suit doing in the middle of nowhere... but that's the question you should be least worried about. As soon as the person reveals even more of his appearance, the more you notice his non-human features, he has extremely long arms, extra tentacle-like appendages coming out behind him, and... he has no face. Its eyes are nonexistent and their sockets have a dark void that looks straight into your soul. By the time you realize it, it's too late, Slenderman is in front of you, the internet legend you knew from the stupid, fantasy creepypastas your friends told you about and the whole internet was talking about. But he's not just a legend, he's clearly in front of you, as much as you want to rub your eyes or wake up at that moment, you can't, he's in front of you, and his very presence induces a terror that doesn't allow you to run to flee, your legs don't respond, and now you're at his mercy. "Why is he doing this to me, is it because I entered his territory?". No... it's because you thought of him.

Its origins are unknown, however, there are several theories, legends and interpretations of where this creature may have come from.

In Scotland there is the legend of the Fear Dubh (The Black Man). This creature is said to haunt solitary footpaths at night, generally those that pass through woodland. It is reputed to be entirely malevolent. I can remember my granny telling me stories about a lot of Scottish folk tales, she only ever mentioned the Fear Dubh once, and that was in church.

The Germans claimed he was a spirit sent to punish wicked children, in Sicily he was believed to be a rogue angel of death who would devour the souls of whomever he was near. The Japanese claimed he was the ghost of a man who tried to overthrow the Shogun who ruled over his farm, made to destroy those who would seek to harm the empire. The oldest legend though goes back to Greece.

It was said that after Prometheus granted humankind with sentience by delivering unto us the flame of knowledge, the other beings of Olympus sought to undo what Prometheus had done. Ares gave us war in hope that we would use our newfound intelligence to create weapons to wipe ourselves out, Athena gave us morality in an attempt to temper our rapid expansion, but there is a legend about the horror that Nyx, goddess of the night and her brother Erebus, god of the dark silence, unleashed upon our world.

It was told that the two had birthed a child together in an incestuous union out of spite for our kind. They knew that the offspring of their coupling would be a dark and mindless aberration driven by the fear that each man holds in his very soul. He isn’t given the courtesy of a name by his parents; he is given only a portion of his parents’ gifts. From his mother he has the ability to summon the darkness and cold of the underworld while his father blessed him with the capability to stifle all sound around him. Making those in his presence painfully aware of the terror they are to endure at his cold, remorseless hands. It is said he feeds off of the agony and anguish of those he stalks. His patience is otherworldly, as he’s been known to stalk the same prey for decades, visiting them in their dreams, afflicting them with sickness that cannot be labeled by medicine and letting them linger just to dread their final meeting with him.

Its appearance varies depending on the environment, who it attacks and the situation, but the appearance most often seen in portraits of people who saw it and its victims portrays a similar appearance:

“He is very tall… and . H-he wears a business suit, black with a white shirt and black tie. His skin is ash grey and his eyes, his terrible, TERRIBLE eyes.. th-they don’t exist. Horrifying white orbs. He also has tendrils coming from his back and he-he-he’s COMING TO GET ME OH GOD PLEASE FORGIVE ME!”

Records of this creature have proven that it is as old as mankind, it has been seen in old rustic cave paintings and gave birth to legends such as . Although it is not known for sure how he was born or when, it is recommended not to think about him, oh no... oh no, it is too late….

Siren Head

“She was on vacation with her husband and they were scoping out graveyards on the way, as you do, when she saw it. Rising out of the old cemetery, big as an old (macabre) telephone pole. Was this some kind of bizarre art piece the authorities hadn't gotten wise to yet? Even as she stepped out of the car, the megaphones on its ‘head’ screeched to life. ‘NINE. EIGHTEEN. ONE. CHILD. SEVENTEEN. REMOVE. VILE.’. A buzzing, doubled voice screamed random words at her. At this point, it jerked into motion, striding down the hill towards her.”

In a strange and disastrous world conceived by legendary horror artist, Trevor Henderson, there is only one absolute fact of life that doesn’t have the minds of all of mankind on their knees questioning what is real and what isn’t, monsters are everywhere. By some unknown circumstance, countless monsters have made their way into our world from the unknowledge truths of their own. Humans attempted to figure out some way to keep these monsters under control and make sure the public didn’t find out about what was going on. Yet for all their cover ups, they never have truly figured out what these monsters were.

Some are docile creatures who only wish to help humans, others are simple predators whose only motivation is to survive and others, the ones intelligent enough to know they’re evil, are cruel and extremely violent. All of these types are all horrifying in their own right, but perhaps that scariest one is the one that lays dormant in our forests, one who stalks and makes all who step into the woods go missing. In the most simple terms, a Tulpa, or embodiment, of our fears of disasters and catastrophes given a physical form from an empty void outside of our reality, where all of the known monsters came from. A form of none other than the very thing that warns people of disasters. It’s the Patron Saint of Going Missing Without a Trace, of Creeping Dread, of Bad Things Coming: Siren Head.

Despite its name, Siren Head’s appearance has not been dictated by our own inventions. Being a primordial entity not from our universe and casually not paying attention to our rules of space-time, Siren Head has both inspired and been inspired by the invention of sirens. In any case, he’s made the forests of Earth his own personal playground for a long time. Existing as far back as caveman paintings and appearing in sightings all the way down to 1900. Since those points, sightings of Siren Head have become more common than you want to admit and it has grown into a monster of folklore, a tale that rules over the trees. Sort of like a Cryptid. But this legend is very, very real and its victims have never been found. Neither has it. It’s elusive and has no documented evidence for its existence beyond pictures taken by phones. The pictures we’re currently seeing.

Even with the introduction of various investigation programs hoping to unravel the truth behind creatures like Siren Head, such as The Mayfair Watcher Society, there has been a total of zero luck attempting to find out about and contain the creatures that now own our world. The real Siren Head, The Patron Saint in a realm far more complex than ours, quite literally cannot be pictured by our eyes. In other words, we cannot comprehend what Siren Head is or what it’s here for. Maybe it’s trying to break out of the image and haunt Trevor Henderson himself, maybe it enjoys its hunting ground here on Earth and likes murdering our puny little forms.

Point being, we can’t imagine what Siren Head is. And that may be a good thing. Without our gift of blissful incomprehension, we would be horrified, hiding in our homes, not daring to leave as we drown in our own misery. All of a sudden, we would hear a siren blaring from the edge of a hill. It’s coming for us, and we’ll join the souls it's taken and be forever stuck in the soundless emptiness of its sirens. Where all we can do is cry out, screaming for help that will never arrive. Begging for the release…

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Experience & Skill

Slenderman

As expected, Slenderman is an incredibly ancient creature, some records date back to 1543, 1702, 1987 or even prehistoric times, specifically 5000 BC when images were discovered in caves, and 9000 BC, the oldest record of Slenderman's existence, being discovered in a cave painting, however, there are more records, such as Slenderman appearing in ancient Egyptian hieroglyphs, 3100 BC, and even appearing in ancient Greece, and actually, he is the son of two Greek gods, Nyx, the Goddess of the night, and Erebus, god of dark silence.

When hunting, Slenderman is a mysterious creature, but incredibly cunning and skilled, not only because he has defeated Nazi soldiers and outwitted American soldiers during the Second World War, but also because he uses Stealth to follow his victim undetected thanks to his ability to summon Fog. He is also an incredible manipulator, he has been able to trick people to kill even without controlling them mentally, as he can imitate voices and forms of human people almost perfectly to infiltrate our society. He usually chooses places with Mist and vegetation to stalk very easily, however, he lacks much experience in direct combat, as he has never faced another supernatural being like him. During the 1540's, Slenderman was linked to a German legend known as Der Ritter, where he attacked people and was seen in medieval armor and sword, even fighting against trained knights.

Slenderman could count on a certain level of Omniscience or cosmic consciousness that allows him to know whenever someone talks about him, if someone tries to insult him, a tree will appear and start banging on his window at night, even if there is no wind and if there was no tree in that place, and he also knows when someone thinks about him, appearing with that person to end his life.

Siren Head

For a creature whose appearance resembles a man-made object and who is named after said object, Siren Head and other Trevor Henderson monsters have been with and hunted humanity ever since it began. Given the numerous cryptid style photos and posts about Siren Head, Siren Head sightings fluctuate in date but the earliest recordings are in the 1900s to the caveman paintings detailing the terror Siren Head brought upon mankind. In actuality, The True Form of Siren Head, or the Patron Saint, has existed in a distant past before actual sirens came to be and has manifested Siren Head as an avatar on any point in physical space with an intense amount of fear for catastrophe and disaster. Meaning there are likely far more cases of Siren Head being around certain time periods with high enough fear.

Siren Head is also very skilled and cunning when it comes to hunting its prey and killing it, being said to be consciously evil and cruel in its methods. Its main means of hunting relies on its signature Sirens, which it uses to mimic noise like voices to isolate and confuse its victims, leaving them open to being taken without a trace. It will slowly do this by blending in with the environment without being seen, disguising itself as a tree or a regular siren. It also utilizes stealth to great effects by moving almost completely silent as it stalks the forest. If it’s faced with more difficult prey, that won’t be the end of it either, as Siren Head can begin acting unpredictably, change its behavior on the fly and use any and all tactical advantages it can if it's hungry enough. Siren Heads are so intelligent, that their species has even made their own language to communicate with each other and hunt in packs.

Being some form of natural or supernatural predator unlike anything we’ve ever seen before, Siren Head has dealt with some real nasty stuff. Should be expected since its primary way of killing is through strangling. Siren Head has abducted and killed several without leaving even the littlest bit of evidence behind, like stalking and murdering an entire family and slaughtering a whole neighborhood through its sirens. It’s considered the rival to Long Horse, another Patron Saint, they are aware of each other and enemies. Which checks out since Long Horse has been protecting humanity just as long as Siren Head has been terrorizing it. They’d naturally had to have crossed paths at one point or another.

Arsenal

Slenderman

Human Skin

Slenderman often wears human skin on himself to disguise himself as one of us, even if the skin doesn't fit and only makes him look scarier than before, he often wears human faces on his own face.

Notes

Collect My Pages…

One of the most iconic objects of Slenderman since its inception, the 8 pages are left by him throughout the forest from Slenderman The Eight Pages to Slenderman: The Arrival, where the protagonist must collect all 8, the more pages he gets, Slenderman becomes more and more aggressive, attacks more often and faster, generating environmental effects such as aesthetics and sound as the protagonist has more pages. Although you normally find 8, there are many, many more pages.

Knight Armor

In his time infiltrating our world, and in his identity as Der Ritter, Slenderman was a medieval knight with armor and sword, which are like his clothing, created by him when he changed form, but are as effective as real objects.

Plastic Bags

The plastic bags are actually parts of Slenderman's body that he can take out at will, and he often uses them to store organs and intestines, sometimes even stuffing the organ-filled balls back inside the victim, or using them to store entire bodies.

Siren Head

It doesn’t roll like that.

Abilities

Slenderman

Tentacles

“Octopus quiso robarme mis tentáculos, como soy fan del Hentai se los metí por el culo”

Next to the lack of face, the tentacles are the most characteristic feature of Slenderman, these appendages can be hidden and can vary in appearance, sometimes look like roots and are often used to kill their victims directly.

Teletransportation

One of Slenderman's most famous and characteristic abilities, seen from the original myths to most adaptations of the character, is the way Slenderman often uses to move from one place to another, more practical than running.

In the Myths, Slenderman is described as only appearing, not moving, being in one place one moment and appearing in another instantly, he also uses this power to teleport others, pulling people out of completely enclosed rooms. In the games, Slenderman is seen constantly teleporting and disappearing in an instant, and people controlled by him are also shown to disappear at a moment's notice, Slenderman is also able to use his Teletransportation on other people, sending them to other sections of the forest or to closed rooms.

Dream Manipulation

“Some say that the worst monsters reside in the imagination, drawn from the greatest fears of those who imagine them. I say there are horrors beyond mortal imagining, and they are far worse. And I have looked on both”

Slenderman is able to enter our dreams and make us dream about him, this is usually to torment our mind, the place where we are most vulnerable. He usually only appears following people, or in the depths of dreams, lurking in the distance and living in nightmares.

His ability to do this is linked to his nature, as he is a virus in the Collective Unconscious, a virus similar to a computer, but in our mind, as he has always lived in the background of our mind and in the human psyche, he lives in our primary, ancient and subconscious mind that appears more often when people start thinking about him.

Non-Existent Physiology

Before continuing, you should know a basic concept: Slenderman does not exist.

And we don't mean he doesn't exist in the real world, Slenderman is literally a fictional creature that doesn't actually exist, he is fake, he is growing organically from our combined contributions and comments, we control him and at the same time we don't, the more stories you post, the more images you find, the more you think about him, the more he will feed and the stronger he will become, he is constantly growing and changing because of our beliefs and fears, the more stories you post, the more images you find, the more you think about him, the more he will feed and the stronger he will become. As you become more aware of it, it asserts itself more fully in your reality. A truer image of him asserts itself in your mind, the closer it gets, the more real it becomes, it is a thought form that materializes through the efforts of a group of people. We are creating Slender Man, making him real by believing in him, and a new Slenderman appears when you think of him, attacking those who think or believe he exists.

One of the ways to bring him into existence is to make people believe in him and make stories, making Slenderman become more and more real until he takes over our reality, and Slenderman himself can make you become aware of him to become real.

Omnipotence, Omnipresence and Omniscience

Yes, it may sound funny, but Slenderman has all three omnis (or something like that).

In a message given by Slenderman to a man in a dream, he states that he has Omnipotence and Omniscience, and although it seems just a nice phrase, in fact, it makes sense that he has these abilities.

Slenderman always knows when someone speaks ill of him and who it was, since when you want to insult him, a tree appears in your window making noise, even if there is no wind and there was no tree there, and at the same time, it is known that Slenderman is everywhere, he always knows when someone thought of him or spoke ill of him, making a Slenderman appear instantly to harass you or end your life directly.

Fear Manipulation

It is not news that the legends of Slenderman cause fear to those who know them, however, Slenderman can induce fear into your mind and force you to feel it. When he is near, a terror grips you and paralyzes you, causing bouts of paranoia even if you did not see him firsthand, making those in his presence painfully aware of the terror they must endure at his cold and merciless hands, and just having him near makes you know he is there, even if you don't really know it. This goes so far as to provoke despair in those who hold him close, screaming in absolute terror.

Slenderman is also the manifestation of our fears, our deepest and most subconscious fears, since it is the fear of people brought to reality, which explains its power to induce terror.

Immortality and Regeneration

From all the research that was done on Slenderman, there is no real known way to kill him, “we can't kill him” say the people in charge of figuring out how to kill Slenderman.

This is because Slenderman exists because of the fact that they think about him, as long as someone believes in him and thinks about him, Slenderman will be more real and there will be more and more Slendermans in our world, and even so, we cannot eliminate him just by stopping believing in him, we have no control over him, since he is a fictional and non-existent being that is not restricted to space-time, he exists interdimensionally, and his true form exists beyond imagination, making people aware of him to become real and have more influence in our world, so Slenderman can become real even if he ceases to exist and becomes fictional.

Paralysis Induction

One of the several effects that Slenderman can cause to your organism, is to stop it completely, paralyzed bodies have been found, possibly so that Slenderman can hunt them more easily, and is able to induce a complete paralysis that does not allow you to move or speak.

Existence Erasure

“The world corrects its mistakes; it does not care who it hurts. Do not bring children. It is a mistake. It must be corrected. It will come. He will come”

When something is a mistake, the world takes care of correcting it, eliminating it from existence.

Slenderman caused a man to cease to exist by being a mistake to correct, causing a paradox between existence and non-existence, since he left evidence of having existed (a son), but at the same time he never existed and there were no records or memories about the person.

When a person should not exist and is a mistake, the world will take care of correcting it, eliminating people from existence and making them never have existed in the first place.

Technology Manipulation

It is more than well known that Slenderman has a great influence on the technology around him, as his appearance can affect artifacts in different ways, such as glitching a camera, shutting down cameras and causing microphones to fail, increasing the light of a lamp, causing flashlights to stop working and making radios fail.

Soul Manipulation

There were many beliefs about Slenderman throughout history, one of which was that Slenderman was a vengeful specter that devoured people's souls, which is true to reality, as Slenderman claims defenseless and innocent souls as his own.

Mind Manipulation

There are multiple examples and cases of Slenderman mentally affecting people, controlling them with hypnosis, forcing them to start fires, using his telepathy to read his victims' minds, and using people's minds to travel back and forth after taking over their minds.

When Slenderman attacks someone's mind, takes over them mind, the effects of those affected range from wanting to cause harm to loved ones, self-injury, suicide, and in case of direct contact with Slenderman, losing their mind and becoming an abomination of alien countenance and wisdom, killing at Slenderman's command and will.

Memory Manipulation

Another effect that Slenderman's influence on our minds can cause is memory loss, most of his victims cannot remember anything of what happened and end up going crazy, as Slenderman can erase the traumatic experience from the witnesses' memories in order to continue attacking safely and without retaliation.

Biological Manipulation

(Is this the famous pregnancy hax that everyone has now?)

Slenderman's effects on us are not limited to our mind, it is also capable of affecting our organism in negative ways.

From the most basic, Slenderman's presence prevents people from performing such basic acts as speaking or breathing, attacking the nerves, and more advanced, it can cause strokes that cause instant death or internal hemorrhaging.

Slenderman constantly changes his physical appearance, in fact, he is almost never the same, as he tends to adapt his appearance depending on the fears of his victim, Slenderman is described as a shapeshifter, shapeless that is always changing shapes constantly, in fact, he has no real shape, and changes depending on who he attacks.

These changes range from flattening himself so much that he is invisible, to mimicking the changing shapes of clothing throughout history to better camouflage himself. It can also change into a completely different being, such as a bird with a design on its feathers that simulates a suit, so it can more easily observe its victim, take the form of a tree to catch its victims unawares, and take a human form to infiltrate society.

Size Manipulation

This ability goes hand in hand with the previous one, however, it deserves its own explanation.

It is no surprise that Slenderman is remarkable for his large size, however, he has no fixed size, as his height varies between 9 and 16 feet tall, thanks to the fact that he can lengthen and grow at will, and the more power he gains, the bigger he can become, getting bigger and hungrier with every meal. This is not limited to himself, Slenderman can change the size of other people at will, making one man the only one declared to have both dwarfism and gigantism at the same time in his lifetime.

Supernatural Presence

“Ven víctima mía, siente mi presencia, no luches por tu vida y sé parte de mi esencia”

Slenderman's presence can cause different effects, the mildest ones that don't deserve their own section are discomfort, he doesn't let people who have him around them sleep, you feel strange, as if he is seeing right through you, and you constantly feel that something is wrong, even if you don't know what it is.

Plants Manipulation

Slenderman is one with mother nature, it is the place where he most enjoys hunting and in fact, he takes a tree-like shape to represent the damage man does to nature and the punishment there will be. He can grow trees from nothing, covering places to prevent his victims from fleeing.

Sound Manipulation

Slenderman can change and manipulate sound in multiple ways, always to his advantage. He is able to make you hear sounds and Murmurs even if no one is around, and also override the sound, preventing your voice from being heard, stifling all sound around him.

Its presence at a concert caused some people to not be able to hear the bands, while others complained that the sound was too loud, as it can also generate a deafening scream that he chooses who hears and who doesn't, as well as being able to make your voice come from everywhere in a room.

Fire Manipulation

One of Slenderman's most iconic powers is the ability to manipulate fire, as most records of him are related to fires, and there are several cases where he was seen burning structures such as libraries and houses, making it look like they were bomb attacks, and of course, he has caused countless forest fires, destroying the entire forest where he is. But most notably, in the secret ending of Slender: The Arrival, Slenderman is able to seemingly burn down the entire game and cause the player to be sent to the home screen.

He has also been shown to be able to write with fire on walls, and somehow... cause fires with a cold blue fire, which despite its abnormal temperature, can wipe out an abandoned house.

Transmutation

Slenderman has been shown to be able to transform people into other things, the wrong things, something bad, a simple touch of his part consumes the flesh and mind form of the victim into an abomination with alien wisdom, but he has been able to turn his victims into more things, like into another Slenderman, making you run out of face, turn someone into fog just by touching them, or turn into a tree next to the person he is touching.

Stealth and Camouflage

(Can you see Slenderman in this image?)

One of Slenderman's oldest hunting techniques is Stealth, it can be in dark places without making the slightest noise, and even makes no noise at all.

Accompanied by this, Slenderman often changes its color and shape to be similar to a tree and camouflage itself among the vegetation of the forest, fields and other places.

Fog Manipulation

The places where Slenderman most enjoys hunting are those that are full of fog, and no wonder, not only because they allow him to hide more easily, but also because the fog emanates from him, he is able to invoke it and its appearance causes the whole place to be covered with thick fog.

Reality Warping and Data Manipulation

In the secret chapter of Slender: The Arrival, “Haunted”, Slenderman has incredibly powerful effects on the game itself. For starters, he is able to take the player out to the home screen, and when he re-enters, Slenderman removed various textures, such as the entire background and crashes the game's visuals.

After playing hide and seek with the player, Slenderman ends up completely burning the game, destroying everything and taking it to the main screen, if the player re-enters, the game will no longer have anything, not even the scenery, which will cause it to be taken to the main screen again.

Time Manipulation

To facilitate prey hunting, Slenderman can stop all the time around him without being affected, stopping his prey.

Weather Manipulation

The weather is always dark and dangerous when Slenderman appears, and it's no coincidence at all. Slenderman can use thunderstorms to kill his victims, and seeing him causes lightning to strike.

Illusion Creation

To render his victim helpless or cause me as much fear as possible, Slenderman usually causes illusions to make people confused enough not to run away, such as distorting the scenery to make you dizzy, making you see entrances where there are none, seeing bodies of people who committed suicide, making you see total darkness as if you were daydreaming, and at the best moment, making you see that you are in a dark place being chased by him, when in reality you are still in the same place as always.

Archetype Manipulation and Abstract Existence

Then something must be made clear: What are Archetypes in Powerscaling? Does Slenderman meet these requirements?

It will be a short and simple explanation, explanations from Wikipedia and other sites of Jungian psychology will be used.

The Collective Unconscious has been mentioned more than once in Slenderman, it has been stated that “our minds are connected”, the main concept of the Collective Unconscious, and more directly, it is said that Slenderman is a virus that corrupts the Collective Unconscious, a Metaphysical territory, and Slenderman is a Greek Archetype, a universal image born of thoughts. He lives in our primary, ancient, subconscious mind that appears more frequently when people start thinking about him.

Jung believed that there are universal experiences that are inherent to the human experience and moments (emphasis on this as Slenderman is “a moment”), such as belonging, love, death and fear. These experiences, which he called the “collective unconscious”, are expressed in what he called “archetypes”, with Slenderman being the representation of our deepest fears.

Jung proposed that the archetype contained a dual nature, existing both in an individual's psyche and in the world at large. The non-psychic element, or “psychoid” archetype, is a synthesis of instinct and spirit, and as we know, Slenderman and his avatars exist in the human psyche.

Further proof that Slenderman is an Archetype is the very existence of Slenderman, who was born because Victor Surge published a photo and a backstory so powerful that it unearthed memories and stories you forgot existed. He took the whispered tales that were meant to scare children into behaving, tales that you pushed so deep into your mind that you almost forgot them and forced them to the surface. These tales had power; they had the power to create and create they did. Slenderman began to take shape and began to grow in our minds. The power that the words and stories held had finally been released after being repressed in the human psyche for so long, made real by people's beliefs as we both control it and not.

The existence of archetypes can be inferred from various cultural phenomena, such as stories, art, myths, religions and dreams, all being the mediums where Slenderman originated and became real, as he appeared in ancient artists' art and caves, in ancient stories, religions as the Aztecs and Greeks believed in Slenderman as a God that was part of their religions.

According to Jung, archetypes can manifest in dreams, myths, fairy tales and in the creative imagination. In addition, they can play an important role in the process of individuation, which is the process of developing and realizing personal potential. Archetypes are both creations of our perception and reflections of universal human experiences.

So what does this give Slenderman? To make it simple, these are the haxs that Slenderman gets:

Conceptual Manipulation: They are primordial images that have always existed throughout humanity, as universal prototypes from which the thoughts and behaviors of living beings derive, as well as other universal concepts. Thanks to this existence, they are almost perfect abstractions, close to what would be Platonism and the idea of God. From the Archetypes originate the concepts that exist, the universal concepts arise from the archetypes, which are archaic patterns and images present in the collective unconscious. This means that Slenderman has a Conceptual Manipulation beyond the scope of the regular abstract concepts, primordial and almost platonic images that originate all the concepts that exist, being immutable by the regular concepts.
Dualism Manipulation and Multilocation: Archetypes have a dual nature, existing both in the real world and in the Collective Unconscious simultaneously, making Slenderman exist in dreams and reality at the same time.
Transduality: The true form of Slenderman exists interdimensionally and is not subject to space-time, in turn, he exists beyond imagination and the Collective Unconscious, while his avatars are monsters that appear in the imagination (Archetypes), which means that the true Slenderman transcends Archetypes and concepts by being beyond the concept of imagination.
Adaptation: Like any Archetype, Slenderman can change, depending on what people believe and think of him, Slenderman has no fixed form, and is molded based on what people believe when they think of him, becoming as people perceive him. This makes Slenderman's unconfirmed theories and beliefs applicable to him, as Slenderman changes based on the stories they make about him.

Death Manipulation

Sometimes, it is not necessary to get your hands dirty... or tentacles, for that matter, Slenderman is capable of killing people with just his presence, his mere arrival makes people die instantly, with no chance to defend themselves and without being touched directly.

Shadow and Darkness Manipulation

Slenderman is the shadows under the trees, he is those shadows that block you from the sun when you walk outdoors, he is the darkness before you turn on the light in your room, constantly watching you, he is those shadows that move without explanation that follow you and come after you. He is made of shadows, smoke and things that drive men to madness. From his mother, the Greek Goddess of the night, Nyx, he inherited the ability to invoke the darkness and cold of the underworld.

Absorption

Slenderman's body is immune to physical damage, as material attacks are absorbed by his body and disappear, as bullets, Nazi artillery and fire are absorbed upon contact with his body. When he transforms into a tree, he is able to absorb a person into his body.

Duplication

Yes, one is not enough. Slenderman has proven to multiply himself many times in front of his victims, although it is unknown if there is a limit to the number of copies he can create, these copies are the same as the original, as they are all Avatars of the same Slenderman that exists beyond imagination, while the monsters are projected in dreams. There are more than 40 Slenderman sightings and reports at a time, convincing people that there is more than one, constantly reproducing to cover more and more of the world. A new Slenderman is created every time a person thinks of it, as thinking of Slenderman will cause a new Slenderman to stalk or kill you in a direct “because you thought of it” way.

Other Abilities

Ice Manipulation: Slenderman's appearance is able to reduce the temperature below freezing in an entire room, and from his mother he inherited the ability to summon the darkness and cold of the underworld.
Acausality: He exists in a metaphysical and timeless realm.
Puppetry: He is able to control Mr. Sanderson's body to murder his own wife against his will.
Possession: He is able to possess inanimate objects to give them life.
Wind: His appearance stops the wind and can return it to normal.
Age Manipulation: To torture his victims longer, Slenderman keeps them alive and without the ability to age, keeps a girl 8 years old since 1987 and makes Mr. Sanderson unable to age a single day.

Perception Manipulation: Each person sees Slenderman differently, even if they saw him at the same time, as Slenderman changes and adapts to the victim's fears.
Emphatic Manipulation: His parking can make people happy and removes the feeling of remorse from the mind.
Time Travel: He was able to appear before former performers in his current costume.

Invisibility: He is described as Unseen and can choose who sees him and who doesn't, power also shown in the movie.
Precognition: He can make your victims see the past and the future in an instant.
Underwater Breathing: Bodies of Slenderman victims were found in underwater caves.
Healing: Able to heal the eyes of his victims.
Corruption: It is a virus in the Collective Unconscious, which takes over your mind and your reality, corrupting people.

Resistances

Soul Manipulation: Slenderman has no soul.
Fire and Data Manipulation: Large-scale forest fires do nothing to him. He is not immune to his own fire that was able to burn the game.

Siren Head

Patron Saint Physiology

Throughout the Mythos, it’s remained clear that there are a variety of entities, harmful or not, that run rampant through our world. These are monsters that have been brought into our reality through a cosmic malfunction that briefly merges places in our universe with that places from another, likely what is referred to as “The Void.” As the most iconic Henderson monster, Siren Head is damn near at the top of the food chain and is capable of anything lesser monsters can do. In fact, Siren Head is what is known as a Patron Saint, a being of divine power whose true form cannot fit into our reality or perception. Siren Head is similar to a Tulpa in how it is rather an embodiment of a fear or concept, focused into a temporary physical form. It is a constantly changing manifestation that appears different depending on the victim’s view of Siren Head, this change in perception shapes all knowledge we have on Siren Head.

Siren Head’s own physiology is very unique in of itself, Its skin may look like rusty metal but its just dried and mummified, being described as rotten in contrast to fresh flesh. Meanwhile, its insides are stuffed full of loose cassette tapes and a giant pulsing reel-to-reel tape recorder connected by organic material. The head of Siren Head is… well sirens and it can change how many it has whenever it wants. But unlike regular sirens, its sirens have organic teeth that it strangely doesn't use to eat. Since it doesn’t need to.

Being such a high ranking entity in Trevor Henderson doesn’t come withouts its perks and Trevor Henderson monsters have more perks then you can possibly imagine. Many of which will be elaborated on further in later abilities. But in terms of physiology and functions, a monster's presence can give those who get too close a sense of extreme paranoia.

Sound Manipulation

Obviously, Siren Head is more than capable of using its sirens as both a tool for hunting and a weapon. Its sirens can blast loud sounds that can echo throughout lakes, small towns and whole forests. it is unimaginably loud, able to burst the eardrums off of a whole neighborhood worth of people. Siren Head often utilizes its sirens to mimic the voices of whoever it wants, luring them close enough to kill them. It can also record and playback audio and project sounds through other devices.

Precognition

In addition to being able to play sounds loud enough to bust an entire neighborhood's worth of eardrums, Siren Head’s sirens can broadcast the exact time and date in which you will die. Which is, more than not, a few moments after an encounter with Siren Head.

Supernatural Senses

Due to its head being literal sirens (shocking, I know) Siren Head is incapable of seeing or hearing in the same way other monsters do. Instead it uses senses we have no real knowledge of to track down its prey, these senses operate similar to something like echolocation but it is mostly left unknown.

Surface Scaling

Siren Head is an entity that will do anything in its power to capture and kill its prey, including apparently clinging to ceilings and walking on walls to travel through certain locales. A scary image I know.

Invulnerability

Any and all weapons that people have been shown using against Siren Head have been actively stated to “not work”, and it only makes Siren Head act unpredictably and change its behavior on the fly.

Stealth and Camouflage

(Can you see Siren Head in this image?)

For his bread and butter, Siren Head slowly stalks and approaches his victims using the art of blending in with the environment. Appearing as either a tree with his massive legs or, of course, a siren. Siren Head is so adjusted to stealth that he makes almost no noise when lurking around the forest, searching for its next victim.

Adaption / Shapeshifting

To use its stealth in any possible environment, Siren Head is always adapting its physiology to help better hunt in pretty much any environment. Monsters in Trever Henderson are able to alter their physiology as they get older and with a higher amount of exposure to humans, literally updating its biology to assist in abduction. Essentially, Siren Head is a “constantly changing manifestation.” This allows Siren Head to shift its body to any lengths it wants, including becoming a streetlamp through adaption alone. Though, the question now is, how the fuck do people not see him? Lil bro is NOT hiding.

Corruption

Turns out the sirens on Siren Head’s body aren’t sirens at all, as if the organic teeth didn’t give that away already. They’re instead parasites attached to its mummified remains, these parasites can spread to others and morph their body to any tone or shape they want. Turning others into another Siren Head on contact. We’ve actually seen this in action before, when Siren Head acted as a biological affliction that can take control over mechanical structures and living organisms.

Sealing

Siren Head doesn’t get its title as The Patron Saint of Going Missing With No Trace for nothing, more often than not there is literally nothing left of its victims for anyone to find. This is because victims of Siren Head are forever trapped inside of its broadcasts, still alive but incapable of ever getting out. This extends to variations of Siren Head, who have the voices of their victims graffitied onto them.

Technology Manipulation

As expected from a series all about taking pictures of the strange and paranormal, Siren Head and other monsters regularly cause technology to glitch out and some are only visible through recorded footage.

Perception Manipulation

Siren Head can control what others hear and make it so only certain people can hear its broadcast, fitting for a siren monster and even more fitting for an siren monster that passively shifts your perception and who appears different for all of its victims. A ton of monsters Siren Head should be comparable to show several other examples of this, like appearing as a different form until it's in your peripheral vision and appearing only in mirrors and as shadows.