Creepypasta Origins

Slenderman

This is the best i could find. There wasn't an origin, this is just history and basic info.

The Slender Man (also known as Slenderman) is a supernatural creature with nebulously defined characteristics and abilities. Slender Man was first mentioned in Something Awful Forum's "Create Paranormal Images". He generally appears (in modern times) as a tall humanoid creature in a black or grey suit, red or black tie, and white shirt. His face is totally white, completely devoid of facial features. He has no hair, and generally has normal-looking bare hands, albeit with fingers longer and bonier than a typical human. Slender Man has been depicted in imagery and literature at anywhere between 6 and 15 feet tall, depending on the situation, though in video he is usually only around 6-7 feet tall. Because of his inexact nature, and differences between accounts, no one has yet determined what, exactly, the Slender Man is. Currently, there are two leading theories as to what the Slender Man may be: the Tulpa Effect and Quantum Theory.

Basic Description

In almost every description of the Slender Man, his attributes will vary, sometimes greatly. However, his basic appearance and traits are relatively consistent across different accounts. His appearance has changed over the years, but the most common image – and the most well known in media– is that of an abnormally tall human with long arms and a totally blank face. He is usually portrayed as wearing a business suit, which may be either real cloth, or some form of skin molded to take on the appearance of cloth. If the former, this would imply an intelligent being attempting to try to blend in. If it is the latter, it suggests an extremely adaptive being that evolves to match its environment.

He behaves in what might be seen as a passive-aggressive manner, often stalking targets for years at a time before ever attacking. It's understood that he tends to torture his targets mentally, over long periods of time, using fear and paranoia to drive them to insanity. No one has ever satisfactorily explained the reasoning behind his tactics or the way he chooses his victims, and his purposes and/or motivations have yet to be fully ascertained. He is rarely, if ever, portrayed in a good or benign light and is generally understood to be a malevolent force.

Slender Man is a mystery. He looks like a human being, but doesn't act like one. It is uncertain if he is a social creature, understands human languages or behaviors, or even why humans appear to be his primary targets. It sometimes seems as if he is capable of possessing his targets in some cases. Slender Man's mere appearance provokes fear. This is partially due to his towering height and overall unnerving appearance, and partially due to his behavior, which is almost completely alien. Humans also find it extremely hard to describe The Slender Man: a description in words can be given, but often lack the ability the fully describe the creature. It is believed that Slender Man is from/exists on a fourth dimensional plane, which would account for some of his apparent abilities.

There are two main descriptions of the The Slender Man's behavior. Originally, he was portrayed as being not only malevolent, but also extremely dangerous. He would stalk its targets, impale them on trees, and remove their organs. In comparison, contemporary depictions have turned him into a more passive-aggressive creature. Instead of an active chase, he is more likely to let his prey devolve slowly into madness until they are unable to cope with their situation, often watching from afar as this takes place. If angered, it will charge the aggressor and vanish with its victim to an unknown location. Modern interpretations also show that The Slender Man interacts oddly with electronic equipment and causes massive interference with audio and visual recording devices. Sometimes an individual can determine if The Slender Man is near simply by how certain electronics act. Radios, televisions, and cameras are especially susceptible. How powerful this effect is seems to vary, which could be due either to The Slender Man's state of aggression, or other outside factors that he may or may not be controlling (eg: weather, cell phone signals, etc.)