Cthulhu, Whom Seas Beckon

{g/u}: Adapt 1. (If this creature has no +1/+1 counters, put a +1/+1 counter on it.)
When Cthulhu, Whom Seas Beckon enters the battlefield, you may pay {2} and if you do, you may search your library for any blue or green creature with a converted mana cost lower than the converted mana cost of this card.
Those who die to the sea finally understand death.