I've Ruined the Prehistoric Times by Accepting Disciples and Returning Them Billions of Times.

Xuan Ziqing traveled through the prehistoric times and awakened to the apprenticeship and return system. As long as you accept a disciple and give him items, luck, and merit, you can get hundreds of millions of times back. "Ding, it was detected that the host gave the apprentice a Xuanling physique template, triggering a 10,000-fold return and a set of Chaos Physique Templates as a reward." "Ding, it was detected that the host gave the disciple a Wuji Pill, which triggered a return of ten thousand times, and rewarded him with a Hunyuan Wuji Pill, which can improve his cultivation for a hundred thousand years." "Ding, it was detected that the host gifted the apprentice an innate spiritual treasure, the Ice Soul Whip, which triggers a billion-fold return and rewards a Chaos Bell." … Yuanshi Tianzun: "Who on earth is this Xuan Ziqing? His cultivation is stronger than ours." Leader Tongtian: "How come this person has so many chaos treasures in his hands? This is simply unimaginable!" Taiqing Laozi: "There are such people in the ancient world, how can we get the opportunity of heaven?" Ancestor Hongjun: "Damn it, he has accepted so many disciples, which has caused chaos in the order of heaven. He has ruined the whole prehistoric period!" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.