Slifer

Flying, Trample, Split Second, Hexproof As an additional cost to cast this spell, sacrifice three creatures you control. If this card would enter the battlefield without being cast, during your next end step, sacrifice this card. Slifer the Sky Dragon’s power and toughness are equal to the number of cards in your hand. Second Maw -- When a creature enters the battlefield, that creature gets 2 -1/-1 counters placed on it. If its power is 0 after this, its control sacrifices that creature.{/color#000000}{/fontsize-28}