Can I choose an opponent with fewer than 3 characters in play for The Family Scattered’s effect?
Yes. In that case, the opponent will do as much as they can and resolve the effect in the order written. If the opponent has only 1 character in play, they’ll return that card to their hand. If the opponent has 2 characters in play, they’ll first return one to their hand and then put the other on the bottom of their deck. Buzz’s Arm Buzz’s Arm
Official set release notes — Wilds Unknown
My opponent challenged and banished my Buzz Lightyear – Space Ranger on their turn. Can I now play Buzz’s Arm?
No. The Buzz’s Arm ability Missing Piece doesn’t affect when the item can be played, only that it can be played for free. You still need to adhere to the normal timing restriction of playing cards only on your turn.
Official set release notes — Wilds Unknown