20 Island
1 Aether Gust
1 Arrester's Admonition
1 Disrupt
3 Dream Tides
1 Echo Mage
1 Encase in Ice
2 Enervate
1 Ether Well
2 Flash Flood
1 Gadwick, the Wizened
1 Giant Oyster
4 Hydroblast
1 Insight
2 Jolt
1 Leap
1 Leave in the Dust
1 Lifetap
1 Mind Bend
1 Mind Harness
1 Narset, Parter of Veils
3 Pondering Mage
1 Puppeteer
1 Saltwater Stalwart
1 Scribe of the Mindful
1 Scroll Thief
1 Shipbreaker Kraken
1 Sphinx's Disciple
2 Suffocation
1 Sunken City
2 Thassa's Emissary
1 Tidal Control
1 Tidebinder Mage
1 Verity Circle
Sideboard:
1 Arrester's Admonition
2 Betrayal
2 Brainstorm
3 Code of Constraint
1 Ether Well
2 Sage's Row Denizen
1 Waterknot