20 Island
4 Mystic Sanctuary
2 Chasm Skulker
1 Colossal Whale
3 Convincing Mirage
2 Coral Barrier
3 Counterspell
1 Fowl Play
3 Grayscaled Gharial
3 Hammerhead Shark
1 Harbor Serpent
4 High Tide
1 Inkwell Leviathan
3 Lingering Mirage
3 Phantasmal Terrain
1 Quicksilver Fountain
1 Ruin Crab
3 Sea's Claim
1 Sealock Monster
1 Serpent of the Endless Sea
1 Skyclave Squid
3 Spreading Seas
1 Stormtide Leviathan
2 Treasure Hunt
2 Unsummon
Sideboard: