Scuttlemutt

Text:

: Add one mana of any color.
: Target creature becomes the color or colors of your choice until end of turn.

Rulings:

• 7/12/2019 You must choose one or more of the five colors of Magic while resolving Scuttlemutt’s last ability. You can’t choose “artifact,” “colorless,” or “chartreuse.”
• 7/12/2019 The target creature has only the colors Scuttlemutt gives it—Scuttlemutt’s ability overwrites any previous colors the creature had.
• 7/12/2019 In the Commander variant, the color identities of cards are determined as the game begins. Changing the colors of a player’s commander doesn’t affect its color identity or the cards that can be legally included in the deck.