1 Castle Vantress
1 Halimar Depths
28 Island
1 Lonely Sandbar
1 Myriad Landscape
1 Mystic Sanctuary
1 Reliquary Tower
1 Rogue's Passage
1 Aetherize
1 Charix, the Raging Isle
1 Chart a Course
1 Chasm Skulker
1 Counterspell
1 Defiler of Dreams
1 Eaten by Piranhas
1 Eluge, the Shoreless Sea
1 Fact or Fiction
1 Frantic Search
1 Heraldic Banner
1 High Tide
1 Horned Loch-Whale // Lagoon Breach
1 Hullbreaker Horror
1 Imprisoned in the Moon
1 Kederekt Leviathan
1 Lorthos, the Tidemaker
1 Merfolk Looter
1 Merfolk Pupil
1 Mirrorshell Crab
1 Monstrosity of the Lake
1 Mystic Confluence
1 Nadir Kraken
1 Ominous Seas
1 Oneirophage
1 Ponder
1 Pongify
1 Preordain
1 Quicksilver Amulet
1 Rapid Hybridization
1 Ravenform
1 Reality Shift
1 Reef Worm
1 Resculpt
1 Reservoir Kraken
1 Sapphire Medallion
1 Sea-Dasher Octopus
1 Shipbreaker Kraken
1 Sky Diamond
1 Sleep
1 Sol Ring
1 Stormsurge Kraken
1 Swiftfoot Boots
1 Thassa, God of the Sea
1 The Watcher in the Water
1 Thirst for Discovery
1 Tromokratis
1 Whelming Wave
1 Witness Protection
Sideboard:
1 Callaphe, Beloved of the Sea
1 Deep-Sea Kraken
1 Frogify
1 Hall of Storm Giants
1 Inkwell Leviathan
1 Nezahal, Primal Tide
1 Scourge of Fleets
1 Slinn Voda, the Rising Deep
1 Stormtide Leviathan