4 Botanical Sanctum
2 Breeding Pool
4 Island
2 Mutavault
2 Temple of Mystery
4 Unclaimed Territory
2 Waterlogged Grove
4 Aether Vial
4 Benthic Biomancer
2 Harbinger of the Tides
4 Kumena's Speaker
4 Lord of Atlantis
4 Master of the Pearl Trident
4 Merfolk Mistbinder
4 Merfolk Trickster
2 Merrow Reejerey
2 Remand
2 Spell Pierce
2 Spreading Seas
2 Tidebinder Mage
Sideboard:
2 Chalice of the Void
2 Deeproot Waters
1 Deprive
2 Dismember
2 Dispel
4 Grafdigger's Cage
2 Kopala, Warden of Waves
2 Mana Leak
4 Merfolk Branchwalker
2 Narset, Parter of Veils
1 Phantasmal Image
1 Relic of Progenitus
1 Sentinel Totem
4 Silvergill Adept
1 Smuggler's Copter
2 Spreading Seas
2 Tidebinder Mage
2 Vapor Snag