19 Island
4 Nykthos, Shrine to Nyx
3 Aqueous Form
4 Chasm Skulker
4 Dakra Mystic
2 Master of Waves
3 Monastery Siege
2 Omenspeaker
4 Ordeal of Thassa
3 Retraction Helix
2 Thassa, God of the Sea
4 Thassa's Rebuff
4 Tidebinder Mage
2 Vortex Elemental
Sideboard:
4 Artisan of Forms
2 Bident of Thassa
2 Negate
2 Nullify
2 Polymorphist's Jest
2 Retraction Helix
1 Shorecrasher Elemental
1 Stratus Dancer
2 Triton Shorestalker
2 Triton Tactics