20 Island
1 Abjure
2 Apprentice Wizard
1 Awesome Presence
1 Backfire
1 Betrayal
1 Black Vise
3 Boomerang
1 Creature Bond
1 Daring Apprentice
3 Dream Cache
1 Dream Tides
1 Energy Tap
1 Energy Vortex
2 Erosion
1 Flight
2 Flood
2 Floodgate
3 Ghost Ship
2 Giant Tortoise
2 Impulse
1 Jabari's Banner
2 Jolt
1 Jump
1 Krovikan Sorcerer
1 Mana Chains
1 Meddle
1 Merfolk Traders
1 Mystical Tutor
2 Phantasmal Terrain
1 Power Leak
4 Power Sink
4 Prodigal Sorcerer
2 Psychic Venom
4 Sapphire Charm
4 Sea Scryer
1 Sift Through Sands
2 Soar
2 Spell Blast
1 Sunken City
1 Tidal Wave
1 Time Elemental
2 Unstable Mutation
4 Unsummon
1 Wall of Air
1 Water Elemental
Sideboard:
4 Merfolk of the Pearl Trident
4 Ray of Command
4 Teferi's Drake