Start with a Worm, Reincarnate and Cultivate Immortality

Rebirth+Goldfinger+Dark Flow At the beginning, the protagonist travels to the Demon Gate, transforms into an insect, and then assists the host in practicing. By consuming life span, he can travel through time and space. At the same time, when he helps the host to travel through time, he can extract the host's life span and inherit one of the host's attributes. By observing Chen Fan's experience, Shen Qingchen learned about the dangers of the world of immortality and developed a cautious character. After that, he left Chen Fan and began to venture into the world of immortality on his own...