Merfolk 
Main deck (60)
Creatures (28)
Instants (4)
Artifacts (4)
Enchantments (4)
Lands (20)
Sideboard (15)
Main deck (60)
Creatures (28)
- 3 Harbinger of the Tides
- 4 Lord of Atlantis
- 4 Master of the Pearl Trident
- 2 Merfolk Trickster
- 4 Silvergill Adept
- 3 Svyelun of Sea and Sky
- 4 Tide Shaper
- 4 Vodalian Hexcatcher
Instants (4)
Artifacts (4)
Enchantments (4)
Lands (20)
- 4 Fiery Islet
- 2 Island
- 4 Mutavault
- 4 Scalding Tarn
- 4 Spirebluff Canal
- 2 Steam Vents
Sideboard (15)
Compared with the average Merfolk list
Average of 42 decks in the 30 days up to Sept. 16, 2023, the day of this tournament.
Main deck
More than usual
- +4 Flame of Anor (4 vs 0.1)
- +4 Scalding Tarn (4 vs 0.1)
- +4 Spirebluff Canal (4 vs 0.1)
- +4 Fiery Islet (4 vs 0.2)
- +3 Spreading Seas (4 vs 0.6)
- +3 Harbinger of the Tides (3 vs 0.2)
- +2 Steam Vents (2 vs 0.0)
- +2 Silvergill Adept (4 vs 2.3)
Fewer than usual
- -6 Island (2 vs 8.0)
- -3 Cavern of Souls (0 vs 3.4)
- -3 Force of Negation (0 vs 3.0)
- -2 Merfolk Trickster (2 vs 3.9)
- -2 Dismember (0 vs 1.9)
- -2 Otawara, Soaring City (0 vs 1.5)
- -1 Mistcaller (0 vs 1.2)
- -1 Preordain (0 vs 1.0)
Sideboard
More than usual
- +4 Alpine Moon (4 vs 0.1)
- +3 Lightning Bolt (3 vs 0.1)
- +3 Pithing Needle (3 vs 0.1)
- +3 Relic of Progenitus (3 vs 0.3)
- +2 Tidebinder Mage (2 vs 0.1)
Fewer than usual
- -3 Chalice of the Void (0 vs 2.7)
- -2 Subtlety (0 vs 1.8)
- -1 Dismember (0 vs 1.5)
- -1 Kira, Great Glass-Spinner (0 vs 1.1)
- -1 Stern Scolding (0 vs 1.0)
This is the most unusual list of the archetype in this period: 26 cards away from the average.