33 Island
1 Reliquary Tower
1 Adaptive Automaton
1 An Offer You Can't Refuse
1 Arcane Denial
1 Arcane Signet
1 Archmage's Charm
1 Bident of Thassa
1 Capsize
1 Coat of Arms
1 Coralhelm Commander
1 Counterspell
1 Cursecatcher
1 Deepchannel Mentor
1 Deeproot Waters
1 Enclave Cryptologist
1 Extraplanar Lens
1 Forbid
1 Glasspool Mimic // Glasspool Shore
1 Harbinger of the Tides
1 Herald's Horn
1 Inundate
1 Kindred Discovery
1 Kopala, Warden of Waves
1 Library Larcenist
1 Lord of Atlantis
1 Lullmage Mentor
1 Mana Leak
1 Master of the Pearl Trident
1 Master of Waves
1 Merfolk Sovereign
1 Merfolk Trickster
1 Merfolk Wayfinder
1 Merrow Commerce
1 Merrow Harbinger
1 Merrow Reejerey
1 Metallic Mimic
1 Muddle the Mixture
1 Negate
1 Pongify
1 Quicksilver Fountain
1 Quietus Spike
1 Rapid Hybridization
1 Reality Shift
1 Sage of Fables
1 Sapphire Medallion
1 Scourge of Fleets
1 Sea Scryer
1 Seafloor Oracle
1 Seahunter
1 Sigil Tracer
1 Sol Ring
1 Spectral Deluge
1 Stonybrook Banneret
1 Streambed Aquitects
1 Surgespanner
1 Svyelun of Sea and Sky
1 Teferi, Master of Time
1 Tempest Caller
1 Thada Adel, Acquisitor
1 Thassa's Rebuff
1 Thieving Skydiver
1 Tidal Courier
1 True-Name Nemesis
1 Wake Thrasher
1 Wanderwine Prophets
1 Wash Out
1 Wizard's Retort
Sideboard:
1 Brineborn Cutthroat
1 Coralhelm Commander
1 Cryptic Command
1 Deepchannel Mentor
1 Intruder Alarm
1 Mist-Cloaked Herald
1 Mistcaller
1 Reef Shaman
1 Seafloor Oracle
1 Seahunter
1 Silvergill Adept
1 Stormtide Leviathan
1 Sword of Hearth and Home
1 Sword of Sinew and Steel
1 Thassa's Oracle
1 Tidal Warrior
1 Tide Shaper
1 Tidebinder Mage
1 Tideshaper Mystic
1 Triton Shorestalker