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 12 decks in the 30 days up to May 6, 2017, the day of this tournament.
Main deck
More than usual
- +4 Flooded Strand (4 vs 0.3)
- +4 Noble Hierarch (4 vs 0.3)
- +3 Breeding Pool (3 vs 0.3)
- +3 Collected Company (3 vs 0.3)
- +3 Phantasmal Image (3 vs 0.3)
- +2 Hallowed Fountain (2 vs 0.2)
- +2 Polluted Delta (2 vs 0.2)
- +1 Wanderwine Hub (2 vs 0.9)
Fewer than usual
- -8 Island (4 vs 11.7)
- -4 Aether Vial (0 vs 3.7)
- -4 Cursecatcher (0 vs 3.7)
- -4 Master of Waves (0 vs 3.6)
- -1 Cavern of Souls (0 vs 1.1)
Sideboard
More than usual
- +2 Ceremonious Rejection (3 vs 0.7)
- +2 Kor Firewalker (2 vs 0.2)
- +2 Rest in Peace (2 vs 0.2)
- +2 Rhox War Monk (2 vs 0.2)
- +2 Stony Silence (2 vs 0.2)
- +1 Relic of Progenitus (3 vs 1.9)
Fewer than usual
- -3 Unified Will (0 vs 2.9)
- -1 Dispel (0 vs 1.3)
- -1 Hurkyl's Recall (0 vs 1.3)
- -1 Tectonic Edge (0 vs 1.1)
This is the most unusual list of the archetype in this period: 22 cards away from the average.