Merfolk 
Main deck (60)
Creatures (30)
Instants (5)
Enchantments (4)
Lands (21)
Sideboard (15)
Main deck (60)
Creatures (30)
- 1 Cold-Eyed Selkie
- 4 Harbinger of the Tides
- 4 Lord of Atlantis
- 4 Master of the Pearl Trident
- 4 Merrow Reejerey
- 4 Noble Hierarch
- 3 Phantasmal Image
- 4 Silvergill Adept
- 2 Vendilion Clique
Instants (5)
Enchantments (4)
Lands (21)
Sideboard (15)
Compared with the average Merfolk list
Average of 3 decks in the 7 days up to May 6, 2017, the day of this tournament.
Main deck
More than usual
- +3 Flooded Strand (4 vs 1.3)
- +3 Noble Hierarch (4 vs 1.3)
- +2 Breeding Pool (3 vs 1.0)
- +2 Collected Company (3 vs 1.0)
- +2 Phantasmal Image (3 vs 1.0)
- +1 Hallowed Fountain (2 vs 0.7)
- +1 Polluted Delta (2 vs 0.7)
- +1 Wanderwine Hub (2 vs 0.7)
Fewer than usual
- -6 Island (4 vs 10.3)
- -3 Aether Vial (0 vs 2.7)
- -3 Cursecatcher (0 vs 2.7)
- -3 Master of Waves (0 vs 2.7)
- -1 Cosi's Trickster (0 vs 1.0)
Sideboard
More than usual
- +1 Kor Firewalker (2 vs 0.7)
- +1 Rest in Peace (2 vs 0.7)
- +1 Rhox War Monk (2 vs 0.7)
- +1 Stony Silence (2 vs 0.7)
- +1 Ceremonious Rejection (3 vs 1.7)
Fewer than usual
- -2 Unified Will (0 vs 2.0)
- -1 Spell Pierce (0 vs 1.3)
- -1 Threads of Disloyalty (0 vs 1.0)
- -1 Tidebinder Mage (0 vs 1.0)
This is the most unusual list of the archetype in this period: 16 cards away from the average.