The Eternal True Heart of Rebirth for a Hundred Generations

Accidents may be accompanied by misfortune, but our protagonist is the lucky one among misfortunes. Unfortunately he died, but fortunately he traveled through time. He came to a strange world, but he had two gifts carefully prepared for him in his previous life. One is the artifact coffin, and the other is his body. It was also the main reason why he traveled through time. The body is marked with the mark of one's own soul in previous lives. It was supposed to be fused after reincarnation, but something happened. The protagonist goes to this special place on Earth. However, when it merges again, the protagonist's dead soul enters the underworld again. The consciousness left behind in his previous life also contains his own biggest secret, the 'curse'. When he entered this world, he was accidentally rescued by a small family who took a fancy to his talent in cultivation and recruited him as their son-in-law. But how could the protagonist stay in a corner? I accidentally discovered that this world is a parallel world to the earth. It has the heaven in the earth's mythology, Western Buddhism, and the ancient Greek gods. Underworld, demon clan. There are also demons that are not found in earth mythology. The timeline here doesn't match up with Earth either. From then on, the protagonist embarks on the journey to find his way home. Lift the curse and find the truth about yourself. The protagonist searches all over the world and breaks through himself to become the protector of this universe. If there are too many secrets, I'm afraid people won't like them if they are revealed. It's better for you to accompany the protagonist to find out.