Maelyth, Keeper of the Dead

When Maelyth, Keeper of the Dead enters the battlefield, exile X creature cards from your
Graveyard. Create that many 2/2 Zombie tokens.
{2}{u}{b} Exile Target creature card from your Graveyard, create a 2/2 Zombie token.
Zombie creatures you control have Lifelink and Vigilance.