Once the siblings left, Zatiel sat back on the throne and closed his eyes for a moment as he regained his strength. Allowing the consciousness of a life form, whose soul force borders Rank 5 in power, to experience years of training in a little more than ten minutes was exhausting.
Zatiel's most important organs were his Bloodline Heart that held his eclipse, the Elemental Chaos Heart with the Chaotic Core, his brain that contained his soul dimension, and the Rebirth Eye. Excessive pressure on any of them would have dire consequences to the Neo-Demon. Luckily, this time he only needed to rest for a couple of days and would be good as new.
It was only after an hour that Zatiel opened his eyes again. His right eye was opened, but the purple energy in it was rotating very slowly. The Neo-Demon focused on the group that had been waiting for him all this time, and his sight finally landed on the Fallen.