Father's old enemy.

Uncle, his uncle helped him leave the prison and came to a continent. There were all prisoners there. As long as he reached Level Nine, he could get out. The protagonist had been digging for things to cultivate. In the end, he encountered some skills and some cultivation stones left behind by a dead immortal in the cave. That was the beginning of the plot. The rest was cultivation, going to a higher level continent, and then reaching the top. I saw it a long time ago, but I can't remember its name now. Beg, he wanted to reminisce about it. There was another point that he had entered the Spirit World or the Ghost World, and obtained a Bloodthirsty Blade. He had even become brothers with a Ghost King inside, and when he came out, he had even accidentally obtained an interspatial ring in a room. After that, he couldn't say anything. In any case, it was just a normal level of 9 liters and then something like Saint Venerable or something like Emperor all the way to the top. That's all I can remember. I've forgotten the name of the main character. Please tell me.
Also, he was a blacksmith, right? With his talent in crafting weapons, he could forge some top-grade weapons. Then, his two girlfriends (one of them was a little girl from the village that took him in after he was injured. In the end, when everyone in the village was killed, she took him with her. The other woman seemed to be the daughter of a county's chief) cultivated to level 8 with his help. It was enough to protect themselves in the low-level continent, and their lifespan could be 500 years. When he went to the higher-level continent and came back, he found that he had been torn apart by a winged person and taken away. In the last part, he was conferred the title of Supreme Demon Emperor or something like managing hell or the demon world. I don't really remember, and then I saw them again.

Answer 1

I recommend the book "Guarding the Prison for a Hundred Years, and the Demon Lord is Exposed" to you. The plot is somewhat similar to what you described. The protagonist Su Bai was locked up in prison. The prison administrator was his enemy and wanted him to be locked up there forever. However, Su Bai had made a Sin-Cleansing Cauldron which could suppress people in prison. Those who were suppressed by the Sin-Cleansing Cauldron could get rewards for cultivation. Later on, the return of the Demon Lord broke Su Bai's peaceful life. Su Bai was reborn and led the demon army to attack Great Xia. His Cauldron of Purification became the key. I hope you like my recommendation. Muah ~