Slender Man

Gee, he's getting really popular recently. Perhaps Marble Hornets fanart is in order. I think it's pretty ironic (and pretty cool too) that Slender Man was fabricated intentionally as a fictitious urban legend sort of thing that people could build around, in the form of pasta and image manipulation. But now his sudden memetic mutation is pushing him closer and closer towards actually BEING an urban legend - many people I know who've only heard of it recently are completely unaware that it's a meme at all. So it really worked perfectly in that respect.