Prehistoric: Rewards Automatically Upgrade on the First Day of Signing In

Prehistoric: On the first day of signing in, you will get an automatic upgrade Chen Changsheng traveled through the prehistoric times, became a disciple of the Jie Cult, and awakened the sign-in system. Others were rewarded with various treasures for signing in, but he received only one system after another. The system will automatically upgrade upon awakening on the first day of signing in. The god-level selection system will reward you on the tenth day of signing in. Signing in for one month will reward you with a god-level copy system. ... Automatic upgrade: "Host, stay well, I will upgrade you and fly you!" God-level choice: "Kill Dingguang Immortal immediately and reward the Chaos Treasure, the World-Destroying Millstone." Robust system: "Practice well and go out for what you want." Traveling Panda: "Master, I brought you the Hongmeng Purple Qi from Chaos." Chen Changsheng: "It's not that I want to become stronger, but that I have too many systems." Unknowingly, Chen Changsheng became the supreme being in the world... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.