Sure, Tuvasa kind of hijacks the Merfolk theme and replaces it with a more Enchantress-y build, but she does grow to immense heights rather quickly if you're throwing down the right Auras and enchantments, and Merfolk sub-synergies can certainly still flourish in a Tuvasa-led deck
Still, the set is just behind the corner, and with Wizards packed Magic: the Gathering release schedule way too fast, if you ask me spoilers will emerge soon
Black Need to build up your board while continuing to draw cards
Green Slime is one card that has caused quite a stir in the Commander community recently
However, if you look closely, these decks are much closer to identical than variants of other archetypes, such as the various Aristocats decks I wrote about last week
If anyone on the table is running Blue, they will fear the potential of one of the wildest removal cards in all of Magic