Merfolk 
Main deck (60)
Creatures (27)
Instants (6)
Artifacts (4)
Enchantments (3)
Lands (20)
Sideboard (15)
Banned
Main deck (60)
Creatures (27)
- 4 Benthic Biomancer
- 3 Harbinger of the Tides
- 4 Lord of Atlantis
- 4 Master of the Pearl Trident
- 4 Merfolk Trickster
- 4 Silvergill Adept
- 4 Unsettled Mariner
Instants (6)
Artifacts (4)
Enchantments (3)
Lands (20)
Sideboard (15)
- 3 Auriok Champion
- 2 Damping Sphere
- 4 Deprive
- 2 Echoing Truth
- 1 Lurrus of the Dream-Den
Banned - 3 Relic of Progenitus
Compared with the average Merfolk list
Average of 69 decks in the 90 days up to March 6, 2021, the day of this tournament.
Main deck
More than usual
- +3 Seachrome Coast (4 vs 0.9)
- +3 Unsettled Mariner (4 vs 1.1)
- +3 Benthic Biomancer (4 vs 1.3)
- +2 Wanderwine Hub (4 vs 1.7)
- +2 Harbinger of the Tides (3 vs 1.1)
- +2 Dismember (3 vs 1.1)
- +2 Hallowed Fountain (2 vs 0.3)
- +2 Flooded Strand (2 vs 0.3)
Fewer than usual
- -2 Island (5 vs 6.6)
- -1 Mutavault (2 vs 3.2)
- -1 Waterlogged Grove (0 vs 1.1)
- -1 Merrow Reejerey (0 vs 1.1)
- -1 Darkslick Shores (0 vs 1.0)
Sideboard
More than usual
- +3 Deprive (4 vs 0.9)
- +3 Auriok Champion (3 vs 0.2)
- +2 Damping Sphere (2 vs 0.1)
- +2 Echoing Truth (2 vs 0.4)
Fewer than usual
- -2 Chalice of the Void (0 vs 1.7)
- -2 Pithing Needle (0 vs 1.5)
- -1 Dismember (0 vs 1.3)
- -1 Force of Negation (0 vs 1.1)
Most unusual list in this period: Bishark in Modern Preliminary (27 cards away from the average)