Blood Transfusion

As an additonal cost to cast this spell discard a
blue card from your hand.
Return target creature from your exile to the battlefield under your control. You lose life
equal to its converted mana cost.
Transmute {1}{u}{b}: (Discard this card, search your library for a card with the same converted mana cost, reveal it, then put it into your hand. Shuffle your
library.)