Kejouwei of the Ninth Door

Whenever Kejouwei of the Ninth Door becomes blocked by a creature that shares a type with it, destroy that creature.
{1}{u}{b}{r}: Put target creature blocking Kejouwei of the Ninth Door into its owner's library third from the top. Kejouwei of the Ninth Door becomes all of that creature's types in addition to its other types.
Screams of its victims silence current prey.