From Blue Star to Prehistoric Times: Sign in to Be Invincible

When he woke up, Chen Yu traveled to the parallel world Blue Star and was bound to the [God-level Sign-in System]. I thought it was just a matter of changing 996's place, but I didn't expect the system to make him invincible directly! Out of boredom, he embarked on a journey across all realms: After signing in "Swordsman", Dongfang Bubai wanted to give him the leadership. When signing in to "Legend of Sword and Fairy", the leader of the Moon Worshiping Church shouted, "It turns out the earth is really round." After signing in "Ancient History", Taozu invited him to sit down and discuss Taoism. Just when Lin Fan thought that his happy life would continue forever, the system revealed his origin, and it turned out to be...