"Huh…?"
"We're… alive?"
The heads of Nebarius looked at each other with great difficulty. Living in the underworld for some time has made them aware that 'dying' in that realm would make them disappear from the face of reality.
Being conscious, obviously, he's not 'dead' yet. Once this realization sunk in, he looked around to find himself in a place he's seen before but had never been into.
It's the palace's Recovery Room.
Medications are unnecessary in the world of the dead. As long as they are dead, they are part of the realm. Only if the realm itself collapses do they 'die' entirely. And this realm is Hades himself. If he wills it, all will die.
He and the other masters have the capability to 'kill' in the realm of the dead. No matter how strong one is, they cannot kill what is already dead. Even if the dead are shredded to their very cells, they would only need more time to recover.