Dio, God of Gods

Flying, indestructible, hexproof, first strike, deathtouch, vigilance, convoke.

Whenever one or more Dragons you control attack, draw that many cards, then you may
put three permanent cards from your hand onto the battlefield. During your upkeep place a Dragon creature card from your hand onto the battlefield.
Dio, God of Gods can only be destroyed by being dealt the exact amount of toughness this creature has.