1 Castle Vantress
27 Island
1 Myriad Landscape
1 Mystic Sanctuary
1 Remote Isle
1 Saprazzan Skerry
1 Seafloor Debris
1 Skyline Cascade
1 Soaring Seacliff
1 Svyelunite Temple
1 Aetherspouts
1 Archipelagore
1 Armillary Sphere
1 Counterspell
1 Deep Analysis
1 Deep-Sea Kraken
1 Deep-Sea Terror
1 Disdainful Stroke
1 Divination
1 Dreamscape Artist
1 Dreamstone Hedron
1 Elder Deep-Fiend
1 Essence Scatter
1 Finale of Revelation
1 Flood of Tears
1 Frantic Search
1 Frilled Sea Serpent
1 Game Plan
1 Gearseeker Serpent
1 Ghirapur Orrery
1 Gilded Lotus
1 Hedron Archive
1 Kiora Bests the Sea God
1 Kraken Hatchling
1 Kraken of the Straits
1 Kumena's Awakening
1 Leyline of Anticipation
1 Mana Geode
1 Merfolk Looter
1 Mesmerizing Benthid
1 Mind Stone
1 Mu Yanling, Sky Dancer
1 Mystic Confluence
1 Nadir Kraken
1 Negate
1 Octoprophet
1 Opt
1 Prowler's Helm
1 Riverwise Augur
1 Sandbar Merfolk
1 Sandbar Serpent
1 Scrapdiver Serpent
1 Sea Monster
1 Sea Scryer
1 Sea Serpent
1 Sea Snidd
1 Sealock Monster
1 Search for Azcanta // Azcanta, the Sunken Ruin
1 Seer's Lantern
1 Segovian Leviathan
1 Serpent of the Endless Sea
1 Silvergill Adept
1 Sleep
1 Slinn Voda, the Rising Deep
1 Sol Ring
1 Solemn Simulacrum
1 Steelclad Serpent
1 Stormtide Leviathan
1 Striped Riverwinder
1 Summary Dismissal
1 Sword of the Animist
1 Tempest Caller
1 Thassa, Deep-Dwelling
1 Thassa's Intervention
1 Thassa's Oracle
1 Traveler's Amulet
1 Treasure Cruise
1 Triton Shorestalker
1 Tromokratis
1 True-Name Nemesis
1 Vessel of Endless Rest
1 Witching Well
1 Wonder
Sideboard:
1 Arcane Adaptation
1 Brineborn Cutthroat
1 Cancel
1 Coralhelm Guide
1 Dissolve
1 Flight Spellbomb
1 Glassblower's Puzzleknot
1 Kiora's Dambreaker
1 Kopala, Warden of Waves
1 Manalith
1 Mist-Cloaked Herald
1 One With the Wind
1 Saltwater Stalwart
1 Seafloor Oracle
1 Sinister Sabotage
1 Thought Collapse
1 Will Kenrith