I Was Actually Reborn with the Saint?

This is a world of swords and magic, with numerous races, mysterious dragons, evil dark races, elves living in seclusion in the magic forest, and even traces of gods. Fang Quan was a general in the Northern Army, fighting for the kingdom against the dark races from the north. But who would have thought that the corrupt nobles of the kingdom would choose to make Fang Quan a scapegoat and sell his army to the dark race for the sake of profit. After narrowly escaping from death, Fang Quan went completely crazy after learning the truth. He chose to practice forbidden arts and became a blood sacrifice summoner to take revenge on the nobles of the kingdom. When he went to the royal capital, he was stopped by the Saint of Light who had been taking care of him. The battle ended and Fang Quan was defeated and died. Just when he was about to give up his obsession, fate gave him another chance, and he was reborn at the age of 20 with the saint Xiao Wanyue. How will Fang Quan in this life resolve the grievances of his previous life and unravel the mystery of the world?