Bog Standard Isekai - Chapter 7Book 3:

This is a world where science and magic coexist.

Some people here seek powerful magic, and some seek eternal truth.

A science tyrant who came from another world, started as a little librarian, with magic in his left hand and truth in his right, kicking the door of the new century with one kick.

Some people call him the forerunner of magic, some say he is the founder of science.

Some people describe him that way.

In the new century, Blair is a symbol of evil.

- Description from novelbuddy

Devil clan gained the ground and human beings were at the great risk of being wiped out. At this critical moment, six temples led the human race to guard their last land. A young man joined Knight Temple in order to save his mother and he has to go through all those traps and miracles on this tough journey. In a world where human’s six temples fought against devil clan’s 72 devil pillars, would he finally make it to the sealed divine throne?

The path of longevity is loneliness, it is solitude, it is the unbearable cold of being at the summit.Reborn in a different world filled with hidden dangers, Song Changsheng fortunately obtains a mysterious Daoist Scripture:Breaking through to Early-stage Qi Refining, he obtains the “Yin Yang Profound Flower Scripture,” absorbing Sun and Moon Essence, cultivating both Yin and Yang.Breaking through to Mid-stage Qi Refining, he obtains the “Breath Concealment Technique,” concealing his aura and obscuring heavenly secrets.Breaking through to Late-stage Qi Refining, he obtains the “Water and Fire Manipulation Technique,” and the world's water and fire become his vanguards.Breaking through to Qi Refining Great Perfection, he obtains the “Delusion-Shattering Pupil Technique” to see through confusion and trace things back to their source.Breaking through to Early-stage Foundation Establishment, he obtains the “Five Beasts Body Refining Technique”...

One day, a Tower appeared, and with it a proclamation by God that Humanity is to be judged for becoming too corrupt.Regression…It’s an ability so fraudulent that it doesn’t require any detailed explanation.Yes, I also agree that it is a fraudulent ability, but…Isn’t it too much to regress due to just a slightest injury…?