Torgaar, Famine Incarnate [Dominaria]

Set: Dominaria Type: Legendary Creature — Avatar Rarity: Rare Cost: {6}{B}{B} As an additional cost to cast this spell, you may sacrifice any number of creatures. This spell costs {2} less to cast for each creature sacrificed this way.When Torgaar, Famine Incarnate enters the battlefield, up to one target player's life total becomes half their starting life total, rounded down.