Urobo, Titan of the Deep

Hexproof, Uncounterable
When Urobo enters the battlefield, search your library and graveyard for cards named Urobo's Wave, Urobo's Domain, and Urobo's Spawn and put them into your hand, shuffle your library, then draw a card.
When you draw a card, return target permanent to its owner's hand and put a Whale card from your hand on the battlefield.