Cromat allows you to play every mutate creature, all of which can be used to mutate Cromat itself
It depends entirely on the lens you use
Once you begin your turn, you can play cards from your hand, transfer cards to your inkwell, go on quests for lore, challenge your opponent, and use card abilities
The former's "Evolutionary Advantage" let "Flabb" evolve immediately if the user went second at the start of the match, which paved the way for Cosmic Eclipse "Floette" to disrupt the opponent's hand in the same turn
The way Jetmir works is that once you hit various creature count thresholds you unlock a new ability
For a while, we tried to make a new mechanic for each deck