Zatiel was sitting with his eyes closed in the True Neo-Demon Doomsday Chamber, and the raging aura his body was releasing kept growing stronger and stronger. Any life form beneath Rank 3 that was touched by this aura would feel their skin burning due to the cells in their bodies rotting.
The Neo-Demon spent half a day getting used to his new power and restraining the aura and energy inside him. Normally a Rank 4 life form would not have to spend so much time adapting to his new strength, but the upgrade Zatiel obtained was too massive.
After he was able to restrain his power, Zatiel stood up and opened his eyes. They were all in their active form. The power in them obtained a quantitative development and a qualitative change.
When Zatiel was a Rank 3 life form, he could not keep his right eye under control, but awakening his True Soul gave him the strength to rule over the laws in his eye.