Prehistoric: Return to the System, Who Said There Is No Great Emperor in the Human Race?

Yunhan traveled to the prehistoric times and became a member of the human race. Facing the Lich calamity, the human race was weak and almost exterminated. At this time, Yunhan activated the return system. As long as you teach human skills and treasures, you can get system rewards. [Ding, congratulations to the host for teaching the "Burning Technique", ten times the return, and the "Chaos Burning Heaven Scripture" as a reward] [Ding, congratulations to the host for teaching the "Nine Secrets", a hundredfold return, and a reward of "Pangu Heavenly Skill"] [Ding, congratulations to the host for gifting the ancestral witch essence and blood, which will be returned a thousand times, and the Pangu essence and blood will be rewarded! [Ding, congratulations to the host for giving me the innate treasure Pangu Banner, which will be returned ten thousand times, and I will be rewarded with the Chaos Treasure Opening Sky Axe! A series of emperor-level skills were taught to the human race. Pieces of treasures from heaven and earth were given to the human race. At the same time, Yunhan also received more powerful reward returns. Tens of thousands of years later, the Lich Tribulation has truly arrived, and the Demon Emperor, the Eastern Emperor, the Twelve Ancestral Witches, and even the Saints will all have a hand in it. The human race, on the other hand, sat back and watched everything calmly. When it was over, they slowly walked out: "Have you finished the fight?!" "After the fight, our human race is about to begin to destroy the world. This is the way of heaven, so don't let it go!" Boom! Hundreds of millions of great emperors from the human race came out together, and the whole world was shaken.