Ephara, God of the Polis - 145 M BNG

Indestructible
As long as your devotion to white and blue is less than seven, Ephara isn't a creature.
At the beginning of each upkeep, if you had another creature enter the battlefield under your control last turn, draw a card.

mythic
Legendary Enchantment Creature — God
From the Magic: The Gathering set Born of the Gods.