Lets look at all the legendary merfolk in Magic and see which ones are the best commanders, and the types of decks you can build around them
This spell sees mostly Commander play these days, being a politically pleasant way to counter an opponents Atarka, World Render and still offer them compensation for their loss
You don't want to play a deck focused on attacking with creatures You want a deck fully committed to Go Tall or Go Wide strategies (this deck is somewhere in between) You want a deck concept that you can fully upgrade/optimize without spending tons of cash (5C Dragon upgrades can get expensive!) Blood Moon is a thing in your playgroup If you like where this deck is going, then great
It certainly downplays the power of this card
When I look at the formats page, there are seven listed Commander, Standard, Vintage, Legacy, Modern, Block, Team Unified Constructed
It gives access to some different colours and allows players to utilise previously unplayed cards