Drigaaz, The Rot Lord

Creatures you control with flying have infect.

Whenever a creature you control deals combat damage to a player, if this is the first time this ability has resolved this turn, you may deal 3 damage to any target, if it's the second time, add {g}{g} and put a +1/+1 counter on target creature you control, and if it's the third time, you put a lifelink counter and a deathtouch counter on target creature you control, then you may sacrifice a creature, if you do, destroy target creature and draw a card.