4 Cavern of Souls
8 Island
3 Mutavault
3 Waterlogged Grove
4 Aether Vial
2 Benthic Biomancer
2 Counterspell
4 Glasspool Mimic // Glasspool Shore
4 Lord of Atlantis
4 Master of the Pearl Trident
4 Merfolk Trickster
4 Silvergill Adept
2 Spell Pierce
2 Spreading Seas
4 Svyelun of Sea and Sky
4 Tide Shaper
Sideboard:
1 Aether Gust
3 Chalice of the Void
2 Counterspell
2 Grafdigger's Cage
2 Hurkyl's Recall
1 Mystical Dispute
2 Relic of Progenitus
2 Spreading Seas