Oh boy, here we go.
Spoiler
Name of Folklore: The Slender-Man
Type of folklore: Being/Creature
Threat Level: 10
Origin: The Slender-Man originated from a thread on the Something Awful forums known as Create Paranormal Images, where the original creator, Victor Surge put down a couple of photoshops.
Later people in the thread ran with it, and it became less of a Create Paranormal Images thread and more of a Slender-Man thread. Since then, the idea has spread out, creating web-series, blogs, art, video games and cameos and inspirations seen in pop-culture.
The Slenderman is no-longer truly attributed to one person, and has become part of an overarching mythos.
Story: The Slender-Man, Slenderman, or Tall Man has no discernable origins, and is a being that has taken many different forms, sizes, and even abilities over the years. To be blunt, nobody knows exactly what it is, or where it came from, though there are several theories.
Some of the first recorded records of the being are said to originate from cave paintings, though more artistic depictions later showed up in Germany, where they were referred to as The Tall Man.
It wasnt until the 1900s when photography became more prevalent that actual evidence began to show themselves. Common traits include a tall, thin stature, usually in a suit or similar formal attire and always with no face, usually very pale or completely white.
Many instances have been seen with them fixating on children, a disturbing proposition for most.
Records indicate that victims usually suffer one of two fates when encountering the being.
The first is the simplest, and most messy. Many incidents attribute him to impaling victims to trees, letting them bleed out. Several instances of this have found no signs of struggle, and the victims organs placed in bags, seemingly without even leaving the body.
The second is more eerie. Many victims are known to be stalked passively by the creature, eventually inflicting their intended victim with what is known as Slender-Sickness. Causing paranoia, nausea, nose-bleeds, hallucinations, and nightmares, among other things.
They apparently do this for a lengthy period of time. Never actually attacking, and it seems their mere presence there can cause just as much harm, if just mentally. They continue to do this until they fall to madness, in which then the Slender-Man takes them.
It is unknown what occurs after that.
In both cases, after the victim is disposed of, property related to the victim, including housing, work-places or even schools usually receive serious cases of arson, in which nothing is left. This only sometimes occurs, and is not a constant.
Weakness: Nobody has ever harmed the Slender-Man, and many of the reports of those who have been stalked have never actually fought back, which many believe is due to some kind of possible mind altering.
There are a few ways to repel the being that have been reported in old Germanic tales.
One of which is throwing raw, non-artificial saltpeter at it. Guns or gunpowder has had no effect, however saltpeter has been shown to cause them to warp away for unknown reasons, even if they are in direct sight of you.
Another one is simple, although harder. Simply keep as cool-headed as possible and act like they arent there. The being almost seems to want you to register it. Ignoring it has proven to be partially effective, although one still may come down with Slender-Sickness. If you have already reacted to it previously, this will NOT work.
Otherwise, one may simply want to avoid wooded areas or being alone. It prefers to single out victims, even with the smallest opportunities.
Other: Abilities vary greatly, but there are a few which are consistently seen.
Ability to teleport seemingly anywhere, able to appear in a location they were not mere seconds previous.
Their presence appears to cause malfunctions to electronic equipment. Some attribute this to a possible kind of radiation the being emits. May also be the cause of Slender-Sickness.
They can seemingly shift their shape how they wish, including elongating their limbs and clothing alongside being able to emit several tentacle-like appendages from their back.
They have been noted to be able to have almost direct mind-controlling effects, especially effective against younger targets. Things can range from simply beckoning them to it, causing thoughts of murder, self-harm, and other such negative things. Other such things can include inducing short-term memory loss where one cannot remember certain periods of time.
Spoiler
Name of Folklore: The Rake
Type of folklore: Being
Threat Level: 7
Origin/Country of Origin: Many believe the concept for the creature originated from a /b/ thread on 4chan, however, this is not confirmed. The story itself was posted later on Something Awful.
However, nobody knows whether the person who posted it made it specifically for the thread, or pulled it from somewhere else. Meaning the actual author is up for debate. The Rake then got spread about in paranormal sites and thus has since latched into the creepypasta mythos.
Story: The Rakes origins are unclear. However its appearance is. It is described as a seemingly mutated human-like being, pale, 6-7 feet tall and entirely naked and lacking any form of genitalia.
Its eyes are said to be large, beady and smooth, pure black in colour, no iris or sclera. Of most note are its hands, said to possess large scythe-like claws, hence the name Rake. While some depictions show it as a wild, feral creature, others have shown it with surprising intelligence, capable of speech.
The very first written records start from 1691, a simple journal entry describing how they must return to England, that the Rake took everything and that they shall not return here at its request.
Later accounts show it able to fatally injure a child in seconds, showing that while it has intelligence, it is quite brutal and deadly and should be considered incredibly hostile. Nobody knows exactly where it came from, but it assumed to have existed on the North American continent since before the settlers arrived.
Its exact motives are unknown, however some accounts are a series of encounters, leading some to believe that it stalks people in a similar vein to the Slender-Man, although without the crippling sickness that they can leave. Otherwise, the Rake is a mystery. Some believe they may be connected to the Slender-Man in some cases, but there is no confirmation or real proof towards this theory.
Weakness: Information on the Rake is incredibly scarce, however it is said that you can lure it away using meat. One can likely do this to appease the creature as a temporary solution.
It is unknown if conventional weaponry can affect it, but the option is there in dire straits.
Other: Abilities are hard to pinpoint, but the few records have a few things in common.
It can appear in rooms that are even locked from the inside, likely due to some kind of teleportation.
In the few instances of movement recorded, it has been seen as being incredibly fast, far faster than any normal human.
Its claws are incredibly sharp, able to rip through flesh practically by touch. It is unknown of its effects on other materials, but one should be incredibly cautious.
Lastly, on a non-ability note, the Rakes Threat Level is not higher only because of its rarity. Records are scarce on the creature, and sightings or attacks are incredibly rare. Because of this, its threat is lowered to to its low prevalence.
Last edited by Koishi; 04/02/2017, 10:50 PM.

Sometimes when you're driving down a road, a bug hits your windshield. It's ugly and unpleasant, but you just activate the wipers / cleaning fluid and it's gone in a few seconds. It's just part of driving down the road. You don't dwell on it, because that'd be silly. Bugs aren't worth the time.
You just discard their guts and keep on driving.