Powerful modern merfolk deck that uses the new cards from Rivals of Ixalan. Each card is in this deck for a reason:
Kumena's Speaker is a great one drop. Play this turn one and you can never go wrong. Solid option, fits the deck well.
Silvergill Adept helps filter through our deck to find maybe more lands so we can cast Prime Speaker Zegana or possibly a Spreading Seas to start getting huge value out of Seafloor Oracle and the lords.
Merfolk Branchwalker does exactly the same as Silvergill Adept: filters through the deck to find pieces we need.
Lord of Atlantis, Master of the Pearl Trident and Merfolk Mistbinder are all very powerful 2 mana lords. They allow smaller creatures such as Kumena's Speaker to get a boost, which is very powerful. Also multiples of lords? Ridiculous.
Kumena, Tyrant of Orazca. Where do I start? Great abilities, hard to kill in red, easy to activate, can get in for unblockable if needs be, draw outlet, great card, a staple in this deck.
Merrow Reejerey is another powerful lord. The untap or tap ability is great, as you can tap down opponents creatures or untap your your big creatures you just attacked with. Lots of flexibility, great card.
Seafloor Oracle is a very powerful draw outlet. With say a Lord of Atlantis and a Spreading Seas in play, all of our merfolk are now unblockable, so we can swing in and gain huge card advantage.
Forerunner of the Heralds is a good card. It tutors up the merfolk we need for the situation at hand, and can grow to be huge. It is a powerful card that is a worthy inclusion.
Prime Speaker Zegana (which is modern legal, it is in Dragon's Maze) is a very powerful curve topper. It fills our hand very well, it becomes a big body, and helps win the game on the spot. A worthy inclusion.
Spreading Seas is a powerful disruption card that can allow for our islandwalk creatures to get through for unblockable and turn an opposing torn land into an Island. Good card.
Vapor Snag is the only 'removal' in the deck, I am aware. Im just not sure what I would take out for more removal. Please comment on what removal you think should be included in the deck!
