The Horror Monster

It's big, it's fast, it's big, it's fast, it's big. Big big big, fast fast fast... what am i even doing anymore

The main non-human antagonist of a horror movie. It goes around killing people in town commonly without a solid explanation as to why other than Evil's Gotta Evil. The Innocents may find it hard or impossible to kill the Horror Monster as they're plucked off one by one as the movie progresses, but until there are few (sometimes even just one) left, they'll figure it out.