Prehistoric: Relying on the Trading System to Achieve Immortality

During the journey, the great power brought me to the wilderness Zhang Hao woke up and found himself in a strange world. This was a village wrapped in a virgin forest. There are strange existences like mountains in this world, and sacrifices are made to the mountain gods every year. This year it was the Zhang Hao family's turn to offer sacrifices, and the sacrifices were human beings. … If you are a trading system, then we are finished. [Host, don't panic, although I am a trading system, I am an old system with more complete functions] So? [Please check with the host] System mall, skill deduction, auxiliary combat... What else do you not know how to do? [No points will be earned] … How come there are Sanqing exercises in the system mall? Don't mess with the system [The host can practice with peace of mind, they won't find out] They can't find it now, but what about after they become saints? [Just join their door and it will be fine]