Great Tomb of Nazarick

Great Tomb of Nazarick enters the battlefield
tapped.
{t}: add {b}
{1}{b}{t}: Exile target card from a graveyard.
Create a 2/2 black Zombie creature token.
{3}{b}{t}: Sacrifice a creature. Target creature gets
-X/-X where X is the sacrificed creatures power
until end of turn.