Sorin, The Sangromancer

+2: You may discard two cards, if you do, draw a card. You gain 3 life
-1: Target player reveals their hand. Youchoose a nonland card from it. That player discards that card. You lose 3 life
-7: Search your library for any number of vampire creatures and put them into your hand. You lose life equal to their combined converted mana cost