Main deck (60) 2 Castle Vantress 4 Cloudfin Raptor 4 Curious Obsession 1 Dive Down 2 Gadwick, the Wizened 4 Harbinger of the Tides 21 Island 4 Master of Waves 4 Merfolk Trickster 4 Siren Stormtamer 4 Tempest Djinn 2 Thassa, God of the Sea 4 Wizard's Retort Sideboard (15) 3 Entrancing Melody 4 Mystical Dispute 4 Negate 2 Spell Pierce 1 Take into Custody 1 Treasure Cruise