In 2009, a mysterious post popped up on internet forums – a series of photographs featuring a sinister entity depicted as a tall, faceless figure in a suit, with elongated limbs and tentacles. Slender Man, as he came to be known, went on to haunt every corner of the internet. And while most thought he was nothing more than an online urban legend, the lore of Slender Man left the screen when two young girls said he was the reason they tried to commit murder.

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