Q: What if someone uses a Magic Ring while other players are still counting up their points? If one of them turns out to have ten or more points, does that nullify the Magic Ring play, since the game is over as soon as someone wins?

A: No, the Magic Ring user gets to execute their steal before determining if anyone meets the win conditions. The first person to declare their action gets to take it first, so if someone declares that they’re using their Magic Ring, and you realize you have over 10 points, you might want to keep quiet about that until they’re done, so as not to become a target. Then, if you’re still at or over ten points when that’s done, you can start comparing scores with the rest of the players.