Slenderman's origin is surprisingly clear. Unlike most urban legends, we can trace his provenance with absolute certainty. He was born on June 8, 2009, on a forum site frequented by Photoshop pranksters. He belongs to a guy in Florida named Eric Knudsen who has a young daughter and is surprised as much as anything that his demon hasn't yet been thrown onto the slag heap of forgotten memes. An entire history, an entire corpus, has grown up around him in a way that would have been impossible a decade ago.
He is the first pure product of the Internet, a demon spawned not out of a specific place but out of bits. Here's some of his story.
The Slender Man is a supernatural creature that is described as appearing as a normal human being but he is described as being 8 feet tall and he has vectors or extra appendages that are described to be as sharp as swords. The creature is known to stalk humans and cause many disappearances. He is described as a shadow creature that has missing a face. The creature fits into many mythologies in legends from nations such as germany and celts which brings up the possibility that he could be real. A man named victor Surge found this legend and made his own version of it which he called slender man. The slender man is not exactly evil according to mythology but victor Surge's version shows him as an evil creature that stalks humans to kill. In mythology he was actually trying to save you from a painful death by taking you to the under world early.