20 Island
1 Mutavault
4 Aether Vial
1 Counterspell
2 Harbinger of the Tides
4 Lord of Atlantis
4 Master of the Pearl Trident
2 Merfolk Trickster
2 Rishadan Dockhand
4 Silvergill Adept
2 Spell Pierce
4 Svyelun of Sea and Sky
4 Tide Shaper
2 Vapor Snag
4 Vodalian Hexcatcher
Sideboard:
2 Echoing Truth
2 Merfolk Trickster
2 Sleep
2 Spell Pierce
1 Swan Song
2 Unsummon