MTL - The 21st Century of the Gangsters Everywhere - ~ Seven hundred and seventy-five gradually conspicuous changes

Diablo Volfir, a mighty magician, was sealed for aeons due to the schemes of the 12 Gods, but 66666 years have passed since then, and he descends to earth once again!

Sue Kirin was a loser. Thirty years old with no hope for advancement at his job and no redeeming features except one, Magic. For as long as he could remember Kirin had dedicated his life to practicing the Arcane. Unfortunately, when he was passing down his knowledge to his niece, she lost control of her power resulting in a backlash of vicious energy that resulted in her being sent to the hospital, her life in critical danger.

Chu Chen brought the temple in his heart to the Dachang Heavenly Dynasty and worshipped the Taoist gate.

Refining alchemy inside, repairing talisman outside;

Reciting sutras and convincing the spirit, fasting ceremony.

Palm thunder method, pinch sword art, step on Yu step, pray for sunshine and rain, call gods to send generals, relieve Erdu people, cut demons and demons…

- Description from novelbuddy

In the post-apocalyptic age, men were damned.