Legends can only resist the impure spiritual energy, though. They are not immune to it.
So legends can't stay in the spiritual dimension forever. If they stay for too long, they can still turn mad.
Also, liberating their divine forms will accelerate the process of losing their minds, not slow it down. So it is not encouraged for legends to liberate their divine forms in the spiritual dimension.
The second thing that is apparently different about the spiritual dimension is the intense light. There is so much light in the spiritual dimension that it is as bright as day.
All of the light is coming from the sun in the sky. This sun doesn't move at all, so there is no cycle of day and night in the spiritual dimension. There is always day here.
The physical world is always dark and cold. So people need energy springs to live.
