3 Glasspool Mimic
4 Harbinger of the Tides
4 Master of the Pearl Trident
4 Master of Waves
4 Merfolk Trickster
4 Silvergill Adept
4 Svyelun of Sea and Sky
4 Prismatic Ending
4 Ephemerate
2 Force of Negation
4 Aether Vial
1 Cavern of Souls
1 Eiganjo, Seat of the Empire
4 Flooded Strand
4 Hallowed Fountain
2 Island
2 Otawara, Soaring City
1 Polluted Delta
4 Seachrome Coast
Sideboard
2 Force of Negation
4 Counterspell
1 Relic of Progenitus
4 Spreading Seas
4 Subtlety