LuLu

Flash
Deathtouch, double strike, flying, haste, hesproof, indestructible, lifelink, menace, trample, vigilance

{0}: Tap all creatures target player controls, put X +1+/1 counters on LuLu where X is a number of your choice

When LuLu leaves the battlefield return LuLu to its owners hand, exile all creatures your opponents control