Killing America Terror Starts at a Fatal Turn

Bad news: Travel to a world full of terrifying monsters, and the world is still being invaded by the abyss.
Good news: Goldfinger can defeat monsters and upgrade his skills.
It's a cool story about killing with brains, written by a brat, and has complicated ingredients.
It mainly features perverted killers and monsters from American horror films, and basically all of them have been re-created.
Linked stitching: DND Abyss Invasion, some Cthulhu monsters, and a small number of Warhammer settings.
Appearances: Fatal Turn, Underworld, House of Horror, Candyman, The Clown, The Clown, Saw, The Cabin in the Woods, etc.~
He doesn’t abuse his master, doesn’t have too many intrigues, and doesn’t have his own people causing trouble behind his back.