Bomb

Bomb enters the battlefield with two +1/+1
counters on it. Whenever Bomb is dealt damage,
put a +1/+1 counter on it.
When Bomb dies, it deals X damage to each
creature and player that dealt damage to it this
turn, where X is equal to Bomb's Toughness.
Self-Destruct —{r}, {t}, Sacrifice Bomb: Bomb
deals X damage to target creature or player,
where X is equal to Bomb's Power.