Sea Creature decks group together Magic's enormous aquatic creature types, most commonly Krakens, Leviathans, Octopuses, and Serpents. These decks usually ramp into huge blue monsters rather than focusing on one specific type.
Arixmethes, Slumbering Isle provides both mana and an eventual 12/12 creature, while Quest for Ula's Temple can cheat giant sea monsters onto the battlefield. Whelming Wave conveniently leaves most of the deep-sea menagerie untouched upon resolution.
