My senior brother is too steady

Story:

Li Changshou became a little cultivator after being reincarnated in ancient times before the Great God-Conferment War. Li Changshou works hard not to amass karma in order to survive in the harsh Primordial Times. He always organizes everything meticulously before doing anything and never puts himself in risk. He hides his trump cards carefully, practices escape strategies, perfects lethal medications, and develops supernatural skills. Li Changshou had intended to remain concealed and protected in the mountain until he attained immortality. Everything changed one year, though, when his master brought home a junior sister…