The Age of Mythology

I plan to write a prehistoric novel. The protagonist is like a bystander. After he has just achieved the Mahayana stage in cultivating immortality on earth, he is forced to leave the earth due to the cracks caused by the thunder tribulation. After staying in an unknown place for a long time, he feels an opportunity to leave and accidentally comes to the prehistoric world. However, there have been many time travellers, and with the help of the time travelers, the prehistoric world has been changed. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.