20 Island
3 Mutavault
2 Brazen Borrower // Petty Theft
4 Cloudfin Raptor
3 Dive Down
4 Master of Waves
4 Mausoleum Wanderer
4 Merfolk Trickster
4 Siren Stormtamer
4 Tempest Djinn
4 Thassa, God of the Sea
Sideboard:
1 Dive Down
3 Grafdigger's Cage
2 Jace, Architect of Thought
4 Mystical Dispute
3 Rapid Hybridization
4 Spell Pierce