Vecna, the Eternal Dead

Deathtouch, Lifelink, Indestructible
{b}{b}: Create a 2/2 Black Zombie Creature Token
{u}{u}: Draw a card
If Vecna would leave the battlefield, at the beginning of the next end step, return it to the battlefield tapped with {x} +1/+1 counters on it, where {x} is the number of cards in your hand.