Sideboard:
1 Ancient Tomb
1 Arcane Signet
1 Benthic Biomancer
1 Castle Vantress
1 Coastal Piracy
1 Coat of Arms
1 Dakra Mystic
1 Deepchannel Mentor
1 Deeproot Waters
1 Distant Melody
1 Emperor Mihail II
1 Empress Galina
1 Fierce Guardianship
1 Force of Will
1 Glasspool Mimic // Glasspool Shore
1 Harbinger of the Tides
1 Imprisoned in the Moon
26 Island
1 Jwari Disruption // Jwari Ruins
1 Kindred Discovery
1 Kopala, Warden of Waves
1 Lingering Mirage
1 Lord of Atlantis
1 Lullmage Mentor
1 Mana Drain
1 March of Swirling Mist
1 Master of the Pearl Trident
1 Master of Waves
1 Merfolk Sovereign
1 Merfolk Trickster
1 Merrow Commerce
1 Merrow Harbinger
1 Merrow Reejerey
1 Midnight Clock
1 Mistcaller
1 Misty Rainforest
1 Mystic Reflection
1 Mystic Sanctuary
1 Nykthos, Shrine to Nyx
1 Nyx Lotus
1 Otawara, Soaring City
1 Quicksilver Fountain
1 Reflections of Littjara
1 Reliquary Tower
1 Resculpt
1 Rishadan Dockhand
1 River's Rebuke
1 Rootwater Thief
1 Scalding Tarn
1 Sea Gate Restoration // Sea Gate, Reborn
1 Sea's Claim
1 Seafloor Oracle
1 Seahunter
1 Silvergill Adept
1 Sky Diamond
1 Spectral Deluge
1 Spreading Seas
1 Stonybrook Banneret
1 Streambed Aquitects
1 Strixhaven Stadium
1 Surgespanner
1 Svyelun of Sea and Sky
1 Tempest Caller
1 Thada Adel, Acquisitor
1 Thassa, God of the Sea
1 Thassa's Oracle
1 Thassa's Rebuff
1 Thieving Skydiver
1 Tide Shaper
1 Vanquisher's Banner
1 Vodalian Hexcatcher
1 War Room