T: Target player removes a card in his or her graveyard from the game.Whenever you play a black spell, you may untap Merrow Bonegnawer.

Target player discards a card.Retrace (You may play this card from your graveyard by discarding a land card in addition to paying its other costs.)

Wither (This deals damage to creatures in the form of -1/-1 counters.)

Destroy target nongreen creature. Its controller loses 3 life if you played another black spell this turn.

Target opponent reveals his or her hand. Choose a green or white creature card from it. You gain life equal that creature card’s toughness, then that player discards that card.