Deathfilled Waste

Deathfilled Waste enters the battlefield tapped.
{t}: Add {u}, {b} or {r}.
{2}{u}{b}{r}: Deathfilled Waste becomes a 3/4 blue, black and red Elemental creature with "Whenever this creature attacks, create a 2/2 black Zombie Token tapped and attacking." and "Whenever this creature blocks a creature, create a 2/2 black Zombie Token blocking that creature." until end of turn. It's still a land.