The Simple Life of Killing Demons - Chapter 47Book 11:

After a long slumber, Zhou Yi wakes up in a wasteland era. He discovers that the new humans, to avoid the daylight supremacy of the Guangna species, only dare to come out at night, meekly whispering in the darkness and scavenging for trash. Exasperated, he questions how humans could have deteriorated to such a state. Lamenting that each generation seems to be worse than the last, Zhou Yi decides to show them the ways of the older generation. Embarking on a quest to transform the wasteland, he aims to rebuild the lost splendor of humanity.

Xie Jingyuan, the master taoist of Qingxu Temple, was reborn into modern times together with the cat demon Su Miaomiao.

Su Miaomiao: That classmate’s dried fish seems delicious.

Xie Jingyuan: I’ll buy one for you, don’t steal it.

Su Miaomiao: It’s raining, Taoist Priest, come here and pick me up.

Xie Jingyuan: I’m busy.

Su Miaomiao: It’s okay, a male classmate is willing to drop me at the dormitory.

Xie Jingyuan: … Send me the location. ·

- Description from Novelupdates

A world filled with heroes with superpowers. A world attacked by calamity fiends. A modern world filled with wonders and dangers.

It was in the year 2800 of the Midgard calendar. Back then, there was a Overlord who once reigned supreme and had reached the very brink of subduing the world.