The Joker

Flash, Haste, Deathtouch
When The Joker enters the battlefield, create
X 1/1 Joker Goon creature tokens with Deathtouch, where X is the number of creatures you control
{x}{b/g}; Sacrifice X 1/1 Joker Goons, gain 3 life
for each Joker Goon you sacrificed