1 Command Tower
1 Halimar Depths
15 Island
1 Mistveil Plains
11 Plains
1 Rogue's Passage
1 Sejiri Steppe
1 Skyline Cascade
1 Aquatic Incursion
1 Aquitect's Will
1 Arcane Denial
1 Brainstorm
1 Cancel
1 Coat of Arms
1 Coralhelm Commander
1 Counterspell
1 Cyclonic Rift
1 Deepchannel Mentor
1 Deeproot Waters
1 Devastation Tide
1 Disallow
1 Distant Melody
1 Door of Destinies
1 Dovin's Veto
1 Drowner of Secrets
1 Empress Galina
1 Enclave Cryptologist
1 Fallowsage
1 Harpoon Sniper
1 Herald's Horn
1 Intruder Alarm
1 Judge of Currents
1 Kopala, Warden of Waves
1 Lord of Atlantis
1 Lullmage Mentor
1 Mana Leak
1 Master of the Pearl Trident
1 Merfolk Sovereign
1 Merfolk Trickster
1 Merrow Commerce
1 Merrow Harbinger
1 Negate
1 Obelisk of Urd
1 Oblivion Ring
1 Ponder
1 Quicksilver Fountain
1 Reef Shaman
1 Render Silent
1 Rewind
1 River Sneak
1 River's Rebuke
1 Sapphire Medallion
1 Seafloor Oracle
1 Seahunter
1 Sejiri Merfolk
1 Sigil Tracer
1 Smothering Tithe
1 Sol Ring
1 Stonybrook Banneret
1 Stonybrook Schoolmaster
1 Streambed Aquitects
1 Summon the School
1 Sun Titan
1 Swiftfoot Boots
1 Swords to Plowshares
1 Tempest Caller
1 Thada Adel, Acquisitor
1 Tidal Warrior
1 Tideshaper Mystic
1 Training Grounds
1 True-Name Nemesis
1 Unsettled Mariner
1 Vanquisher's Banner
1 Venser, the Sojourner
1 Wanderwine Prophets
Sideboard:
1 Sygg, River Guide