Kanaaq, Deepfathom Angler

{t}: Add X {u}, where X is your devotion to
blue. Look at the top X cards of your library.
You may cast a blue creature spell with converted mana cost 6 or greater from
among them. Shuffle your library. You lose
any unspent mana.
"The ocean is as blue as a dream, as wide as the world -- and as deep as you dare."