Merfolk 
Main deck (60)
Creatures (20)
Instants (12)
Artifacts (4)
Enchantments (4)
Lands (20)
Sideboard (15)
Main deck (60)
Creatures (20)
- 4 Harbinger of the Tides
- 4 Lord of Atlantis
- 4 Master of the Pearl Trident
- 4 Merfolk Trickster
- 4 Silvergill Adept
Instants (12)
Artifacts (4)
Enchantments (4)
Lands (20)
Sideboard (15)
Compared with the average Merfolk list
Average of 3 decks in the 7 days up to March 12, 2019, the day of this tournament.
Main deck
More than usual
- +3 Deprive (4 vs 1.3)
- +3 Dismember (4 vs 1.3)
- +3 Faerie Conclave (4 vs 1.3)
- +3 Repeal (4 vs 1.3)
- +2 Harbinger of the Tides (4 vs 1.7)
Fewer than usual
- -3 Benthic Biomancer (0 vs 2.7)
- -2 Master of Waves (0 vs 2.3)
- -2 Phantasmal Image (0 vs 1.7)
- -1 Cavern of Souls (0 vs 1.3)
- -1 Cursecatcher (0 vs 1.0)
- -1 Island (11 vs 12.0)
Sideboard
More than usual
- +3 Tectonic Edge (4 vs 1.3)
- +2 Chalice of the Void (4 vs 2.3)
- +1 Echoing Truth (3 vs 1.7)
Fewer than usual
- -2 Deprive (0 vs 1.7)
- -1 Vapor Snag (0 vs 1.3)
This is the most unusual list of the archetype in this period: 14 cards away from the average.