We were playing Betrayal on Saturday and the scenario required that the traitor and monsters lose 1 from all traits at the beginning of his turn.
The music box card was also in play and was left open in the same room as the traitor. The music box requires any explorer or monster who starts their turn or enters the same room as the open music box to make a sanity roll and on a result < 4 become mesmerized.
In this case, which happens first? Do the traits get reduced, then the music box triggers, or vice versa? It matters because if the traits are reduced first, the player has a reduced chance of resisting the music box.
In this case we gave the traitor the advantage in the situation based on game context (the traitor started at a severe disadvantage during the haunt given the outcomes of earlier item draws and omens), but what is the correct way? Is there one?