"As long as it invokes the right 'element' on the right pillar, it should be fine. This is more meant to dissuade the uneducated and the unprepared. And the non-magical, all of whom would have been threats to the wizard ruling this place. Which means the last one is probably going to be an anti-mage trap, if I had to guess. But, any healing magic should work, as would anythign that affects the mind, positively or negatively. A charm spell, a quickness of thought... something like that. Not vision, though. That's another one."