Lich King, Lord of the Scourge

Deathtouch, Indestructible
At the beginning of your upkeep, you may exile
a creature card from a graveyard. If you do,
create a 2/2 black Zombie creature token.
At the beginning of your end step, you may tap
X Zombies you control. If you do, return target
creature card with converted mana cost X from
your graveyard to the battlefield.