A Christmas horror movie that claims medieval elf folklore as its source

Rooster Teeth founders Matt Hullum and Burnie Burns have teamed up for a Christmas horror-comedy, "Bad Toys," now in development, Variety reports. Hullum is the writer-director; Burns is executive producer. The official description says the film is inspired by "medieval Christmas elf folklore" and turns on what happens when a mischievous Christmas elf gets involved.

Horror-comedy and the holiday season are a natural pairing — nothing generates dread quite like a cheerful thing that has decided to help.