Surgeon Commander’s color identity is all five colors, thanks to the mana symbols in its rules text. It can be included only in five-color Commander decks. Creative templating, indeed.

Mutate is a keyword from the future! Unless you’re reading this after it’s been released, in which case it’s … a keyword from the present!. But I suppose you could be reading this in a theoretical future in which the keyword was released, threatened to destroy Magic (as I do occasionally), and removed from the game, in which case it’s… a keyword from the past!.