Start Hunting Mammoths by Selling Ice

Bite! Discover low-level civilization and activate the compulsory education system. [It is detected that the host has a certain knowledge of writing and will skip the literacy stage. [If the host's life is detected to be in danger, the system will automatically provide you with the "Summer Drowning Prevention Manual for Teenagers"] From the anti-drowning manual to saving a life, to killing the wolf king with bare hands, every book in the Mumu Discovery System can be used on the edge of a knife. While others worshiped gods for rain, he led his tribe to build a reservoir. The witch doctor tried to become a master, but he opened the "Barefoot Doctor's Manual"...