"At that time, I had almost completed the transformation of the Realm of the Dead, and the resurrection of the Undead was gradually getting back on track, reaching a state of balance, with the number of new Undead slowly decreasing," Nellie recalled, speaking. "Eventually, the previous generation of Undead returned to death, and a new generation of Undead was born from their skeletal remains, achieving a delicate balance between the two, so that the phenomenon of endless growth in the number of Undead no longer occurred."
"Hm? The Undead can return to death?" Pannis asked in surprise, puzzled. "Aren't they immortal?"