You Must Bring a Golden Hand When You Travel Through Time, but I Ended up Traveling with a Golden Hand

What is it like to travel through time and space into a system? Li Xiaoer: The host becomes stronger = I level up, the host fights = I accumulate my essence. The good-for-nothing, the genius, and the devil take turns to be the tools, making shady plans and crushing all opponents with their IQ. Other systems force the host to fight to the death, but I harvest the heavens by manipulating people's hearts, and finally directly prove the system's Immortal Master!