An Immortal Who Lived Ten Thousand Years Ago

In a deserted land, a genius monk from the demon tribe proposed a bet of fighting - "If the demon clan loses, give them the heads of the three great demons, then withdraw from the sky, and never set foot in the sky again for a thousand years." "If the demon clan wins, we will let the human monks on Tianque withdraw from the six thousand miles and give the territory of a dynasty to the demon clan. That's it." So. The talented monks from the human race rushed to Tianque one after another. However, half of the talented monks died on the way. An academy student who didn't like studying and preferred practicing swordsman rushed to Tianque after hearing the news. Halfway through, due to an accident, I went back in time and met a swordsman dressed in blue. He said he lived ten thousand years ago.