Savathun, God of Mischief

Flying, Deathtouch, Lifelink
{x}{u}{g}: Look at the top X cards of your library.
You may reveal a Hive creature from among them
and put it into your hand, if you don't create a 2/3
Hive Knight token with first strike.
At the beginning of your upkeep if you control
Xivu Arath, God of War and Oryx, the Taken
King you win the game.
Esacpe: {u}{b}{g}: Exile 5 cards from your library.