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In 2077, a large number of wormholes appeared on the Blue Star, and the alien beasts inside were ready to move. When the supply of thermal weapons was insufficient, humans had to "learn from the barbarians and develop skills to control the barbarians" and established a pharmacy guild and a blacksmithing guild. Cheng Sheng accidentally synthesized a potential potion using materials from another world. However, what awaited him was not a reward, but expulsion. By the time he obtained the "synthetic system", no one believed him anymore, and he didn't want to clarify anymore... (Note: There are goblins, elves, dragons, and western fantasy dungeons in other worlds.)