Deep-Eyes White Dragon

Flying

Whenever a "Blue-Eyes" creature you control is
destroyed during combat or an opponent's
activated or triggered ability, and you have a Dragon
creature in your graveyard: Put this creature from your
hand onto the battlefield, then inflict 3 damage to target
opponent for each Dragon creature with different names
in your graveyard.

When this creature enters the battlefield, target one
Dragon creature in your graveyard: this creature's Power
and Toughness become equal to that creature's.