Klaervek, the Wicked

{b}{b}: Target creature you control becomes a 4/4 Zombie Warrior with Menace
{w}{b}: Target creature you control becomes a 3/3 Zombie Cleric with Lifelink
{u}{b}: Target creature you control becomes a 2/2 Zombie Rogue with Flying
Whenever a Zombie you control deals combat
damage to a player, put a +1/+1 counter on it