There were three primary ways humans responded to excessive exposure to mana.0

The first was adaptation—a successful adjustment to mana, which often awakened special powers.0

The second was no reaction at all—a response typically seen in those who were naturally insensitive to mana’s influence.0

The third was rejection—a complete inability to adapt, which often led to death.0

Eternal Slumber was a product of the third response, where the soul of the individual was lost, eventually leading to death. Without life-support devices, those who failed to adapt to mana would have no hope of survival.0

Eternal Slumber could be viewed as a state where people left their bodies behind. Medically, it resembled brain death. Just as a body in a brain-dead state could be kept alive through machines, life-support systems kept the bodies of Eternal Slumber victims intact.0

The key difference, however, was far more grim. The odds of a soul returning from Eternal Slumber were significantly lower than those of a brain-dead patient waking up.3

Suho knew of another phenomenon that was very similar...0