Sluggoth demon

Sluggoth Demon is a fictional monster on in the U.S. television series Buffy the Vampire Slayer

After becoming a Vengeance Demon again, Anya granted the wish of a scorned woman named Nancy. The wish turned Nancy's boyfriend into a giant wormlike, sluggoth demon, a demonic maggot that supposedly died out around the time of the crusades. As a demon, the boyfriend hunted down Nancy and even ate her dog while she was walking it. Anya's wish was eventually reversed and the boyfriend turned human again, but just as Spike impaled him with an iron bar, but he was rushed to hospital and survived.