March 2026s Teenage Mutant Ninja Turtles Universes Beyond crossover delivered a bunch of new rat cards, including a few iterations on Master Splinter and even a new Rat King from TMNT lore
But if you are behind a wall of creatures and not threatened, which is common in the later game, then you can rotate his +1 and -1 and over a few turns draws cards, gain life, and influence future combats in your favor
This fact is made more interesting because each promo card is designed to fit right in with Return to Ravnica guild specific abilities
Emmara, Soul of the Accord should likely be replaced by Rhys the Redeemed, while Kutzil, Malamet Exemplar and King Darien XLVIII are solid upgrades
Meria can generate an absolute ton of mana in an artifact deck, and while this isnt something Gruul is known for, the fact that this creature can be your commander may get more people to explore the possibility