A demon-possessed dagger brings Agent Xiang together with Hellboy and Agent Koestler to stop these ancient, dark forces before they infect much, much more. Hellboy creator Mike Mignola is joined by writer Chris Roberson (Hellboy and the B.P.R.D., Panya: The Mummy’s Curse) and artist Michael Avon Oeming (Abe Sapien, Hellboy and the B.P.R.D.: 1956) in this paranormal puzzle that unfolds across time. • Four issue series.