Grimoira, Black Knight

+3: Each player draws two cards, then discards a card. If any of the cards drawn are Black or White, you gain a life.
-1: Regenerate target creature. It has Trample and +1/+1 until end of turn.
-12: Target player puts the top 10 cards of their library into their graveyard. You gain life equal to the converted mana cost of every card combined.