The most impactful card is probably Exterminio, which would translate literally to Extermination but probably references to Overkill, the mechanic from Final Fantasy X, . Exterminio is a black instant removal spell with an interesting twist: setting a creature's health to -9999 plays around indestructible
Should You Grade Misprint Cards
In the realms of strategy, the Rat creature type swarms tokens onto the battlefield, attack with menace or fear, discard cards, and even reduce hand sizes
So is Insatiable Frugivore, a rat that loves to turn garbage into Food tokens
Notably, Sultai Arisen also breaks the trend of Spirit Dragons being awful in the precon, with Teval actually supporting the graveyard strategy (and the main deck Teval is also great in it)
I certainly have been having tons of success with blue, but the format is quite well balanced, so every color has multiple good decks you can get into