1 Arcane Lighthouse
1 Coral Atoll
1 Dreadship Reef
1 Halimar Depths
17 Island
1 Jwar Isle Refuge
1 Shelldock Isle
1 Soaring Seacliff
1 Sunken Ruins
12 Swamp
1 Tolaria
1 Breaching Leviathan
1 Brine Shaman
1 Colossal Whale
1 Coral Barrier
1 Coral Eel
1 Coral Net
1 Coral Reef
1 Crush of Tentacles
1 Dandân
1 Deep Water
1 Deep-Sea Kraken
1 Deep-Sea Serpent
1 Deepglow Skate
1 Devastation Tide
1 Dreamwinder
1 Dulcet Sirens
1 Engulf the Shore
1 Erosion
1 Giant Octopus
1 Giant Shark
1 Gulf Squid
1 Hammerhead Shark
1 High Tide
1 Hypnotic Siren
1 Inexorable Tide
1 Inkwell Leviathan
1 Island Fish Jasconius
1 Jokulmorder
1 Kukemssa Serpent
1 Lorthos, the Tidemaker
1 Man-o'-War
1 Mystic Remora
1 Old Man of the Sea
1 Pirate Ship
1 Reef Shaman
1 Reef Worm
1 Rising Waters
1 Sand Squid
1 Scent of Brine
1 Scourge of Fleets
1 Sea Serpent
1 Seasinger
1 Serpent of the Endless Sea
1 Shipbreaker Kraken
1 Shipwreck Singer
1 Skeleton Ship
1 Spreading Seas
1 Stormsurge Kraken
1 Stormtide Leviathan
1 Submerge
1 Sunken City
1 Tangle Kelp
1 Thassa, God of the Sea
1 Thing from the Deep
1 Thing in the Ice // Awoken Horror
1 Time Warp
1 Tromokratis
1 Walking Sponge
1 Water Wurm
1 Whelming Wave
1 Wormfang Turtle
1 Wrexial, the Risen Deep
Sideboard: