Poseidon, of the Waves

Indestructible
If your devotion to blue is less than 6 Poseidon, of the Waves is an enchantment and not a creature.

At the beginning of your end step target up to two permanents, their controller reveals cards from the top of their deck until a permanent with converted mana cost equal or lesser is revealed, put the revealed card into play and the target card and revealed cards are shuffled into their owner's library