Excerpt from Encyclopedia Dramatica:
My Immortal is the most famous, notoriously bad fan fiction ever written. Based very loosely in the Harry Potter universe and featuring the blatant Mary-Sue protagonist Ebony (or often times "Enoby") Dark'ness Dementia Raven Way, it reads like a detailed list of everything a fanfic author could ever possibly do wrong, only taken to exaggerated, horrifying extremes. Written by super-tard Tara Gilesbie, My Immortal was originally posted to sometime in 2006, but was subsequently deleted by the staff after causing a severe drop in the site's collective IQ. In fact, the fanfic is so unbelievably bad that many refuse to accept that it's real, insisting that Tara was only trolling and that the story is really a parody. Regardless of the author's intent, My Immortal remains one of the most cringe-worthy, unintentionally hilarious, so-bad-it's-good pieces of literature the internet have ever shat out.