Surgeon General Commander

• WWizards of the Coast2020-02-29
  Official Ruling
  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.
• WWizards of the Coast2020-02-29
  Official Ruling
  Mutate is a keyword from the future! Unless you’re reading this after it’s been released, in which case it’s … <spooky music>a keyword from the present!</spooky music>. 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… <spookier music>a keyword from the past!</spookier music>.

Rulings via Scryfall