1 Aethersquall Ancient
1 Arixmethes, Slumbering Isle
1 Breaching Leviathan
1 Brinelin, the Moon Kraken
1 Charix, the Raging Isle
1 Colossal Whale
1 Cryptic Serpent
1 Deep-Sea Kraken
1 Deep-Sea Terror
1 Dirgur Nemesis
1 Eater of Days
1 Elder Deep-Fiend
3 Fishliver Oil
1 Floodchaser
1 Floodtide Serpent
2 Frilled Sea Serpent
1 Gearseeker Serpent
1 Giant Octopus
1 Godhunter Octopus
1 Grozoth
1 Gyruda, Doom of Depths
2 Harbor Serpent
1 Icebreaker Kraken
1 Inkwell Leviathan
1 Isleback Spawn
1 Jokulmorder
1 Kederekt Leviathan
1 Kiora's Dambreaker
2 Kraken Hatchling
1 Kraken of the Straits
1 Leviathan
1 Lochmere Serpent
1 Lorthos, the Tidemaker
1 Merfolk Wayfinder
1 Mesmerizing Benthid
1 Nadir Kraken
1 Nemesis of Reason
1 Nimbus Swimmer
1 Octavia, Living Thesis
2 Octoprophet
4 Ominous Seas
1 Pearl Lake Ancient
1 Polar Kraken
1 Reef Worm
1 River Serpent
1 Scourge of Fleets
1 Sea Monster
4 Sea's Claim
1 Sealock Monster
1 Segovian Leviathan
1 Serpent of Yawning Depths
1 Shipbreaker Kraken
1 Shoal Kraken
1 Shoal Serpent
1 Simic Sky Swallower
1 Sky Swallower
1 Slinn Voda, the Rising Deep
1 Snowfall
1 Spawning Kraken
1 Spire Serpent
1 Stormsurge Kraken
1 Stormtide Leviathan
1 Streambed Aquitects
1 Striped Riverwinder
1 Thing from the Deep
1 Tidal Kraken
4 Tidal Warrior
4 Tide Shaper
1 Tolarian Kraken
1 Trench Behemoth
1 Tromokratis
1 Vodalian Serpent
4 Whelming Wave
1 Wormhole Serpent
1 Wrexial, the Risen Deep
1 Xyris, the Writhing Storm
Sideboard: