How To Raise Your Regressor - Chapter 227 Samur Cringe Eckart

Fu Hongxue was a cripple, born with a lame leg and subject to epileptic seizures. He was also one of the most powerful, legendary figures of the martial arts world, with a dull black saber that was second to none. His fame made him a frequent target of challengers, but whenever his saber left its sheath, only corpses would remain in its wake. One day, however, Fu Hongxue rescued someone whom he should have killed…and in doing so, set of a chain of events and a conspiracy that would rock the world.

After her grandfather's death, Bai Hanyun was disowned by her parents and cast out of the Bai family. With nowhere else to go, she left the city and returned to the countryside. There, by a twist of fate, she discovered an antique mirror hidden in the basement of her newly purchased home. From that moment on, strange events began to unfold—until one day, she stumbled upon a prayer from a young general.Feng Xiyan, besieged by the Yuezhi Tribe and betrayed by the imperial court, had been driven into a desperate corner. With no access to water, food, or medicine, he and the citizens of Xiqiang City could do nothing but await death. But just as all hope seemed lost, Heaven intervened. From that moment on, the Feng Army and the people of Xiqiang City had enough food and water, living lives more prosperous than even the Emperor himself.

While the demons were rising, mankind was about to become extinct. Six temples rose and protected the last territory of mankind.

A young boy joins the temple as a knight to save his mother. During his journey full of miracles and tricks in the world where temples and demons are antagonistic to each other, will he be able to ascend to the strongest knight and inherit the sealed divine throne?

- Description from novelupdates

…but it seems pretty doable.