Weredemon of Khane

As an additional cost to cast this spell, pay 3 life.
Whenever you lose one or more life, discard one
or more cards, exile one or more cards, or destroy
one or more creatures, search your library for an
artifact, creature, or enchantment. Reveal those
cards. Target opponent chooses one of those
cards then you put that card into your hand.
Shuffle the rest of the cards into your library.
Unleashed from hell.