Main deck (60) 4 Aether Vial 3 Benthic Biomancer 2 Castle Vantress 3 Cavern of Souls 3 Dismember 4 Harbinger of the Tides 11 Island 4 Lord of Atlantis 4 Master of the Pearl Trident 3 Master of Waves 4 Merfolk Trickster 4 Mutavault 4 Silvergill Adept 4 Spreading Seas 3 Tidebinder Mage Sideboard (15) 3 Chalice of the Void 2 Echoing Truth 4 Force of Negation 2 Mana Leak 2 Pithing Needle 2 Relic of Progenitus