Joker, Chaotic Evil

Flash,
Whenever Joker, Chaotic Evil enters the battle
-field, deal 2 damage to target creature or player,
you gain 2 life.
At the beginning of your upkeep, put a -1/-1
on target non Hero creature.
Whenever a -1/-1 counter is put on target crea-
ture, its owner discards a card.
{2}{u}{b},{t}: Destroy target creature with a -1/-1 counter on it. Draw a card.