Merfolk is historically one of the most popular Magic tribes and it got a pretty significant upgrade in Modern Horizons 2. Let’s take a look at what an updated Modern Merfolk list with the new cards could look like.
4 Cursecatcher 4 Tide Shaper 4 Rishadan Dockhand 4 Lord of Atlantis 4 Master of the Pearl Trident 4 Merfolk Trickster 4 Silvergill Adept 4 Merrow Reejerey 4 Force of Negation 4 Aether Vial 4 Mutavault 4 Cavern of Souls 3 Waterlogged Grove 3 Darkslick Shores 5 Island 1 Oboro, Palace in the Clouds Sideboard 3 Dismember 3 Counterspell 3 Relic of Progenitus 2 Brazen Borrower 2 Kira, Great Glass Spinner 2 Harbinger of the Tides
Tide Shaper is a good replacement for Spreading Seas because now you can actually attack with it. Rishadan Dockhand is a card I’m excited to try as well since this deck always needed more early drops.
There’s a lot of ways to build this deck actually. You can easily splash white with Seachrome Coast and Wanderwine Hub, which lets you play Lurrus of the Dream-Den as a companion (though you won’t be able to play Merrow Reejerey) and some strong white sideboard cards like Rest in Peace. Black allows to play Dismember without taking too much damage while green gives you Kumena, Tyrant of Orazca, another lord in Merfolk Mistbinder and Kumena’s Speaker as another early drop.