We did not see anything about this in this rules, but we encountered a situation where the monster that our traitor was controlling entered the mystic elevator. Our only remaining hero was wearing armor that was slowing her down, meaning she had a speed of one. At this point, the monster could effectively use the mystic elevator over and over, leaving the hero unable to catch up and fight the monster. Are there rules we missed that would prevent this situation (only using the elevator once maybe?) or is this just a case of "don't be an idiot and ruin the game for everyone else"?