The protagonist possesses a magical multiverse trading system that enables him to freely traverse numerous planes and conduct commodity transactions. He can purchase goods at low prices in one world (such as food or construction materials) and sell them at high prices in another world to make a profit. The system also grants him the ability to obtain rare items and even organize cross-plane auctions to maximize gains. Through these transactions, the protagonist not only accumulates vast wealth but also changes his own destiny, becoming a well-known merchant in the multiverse.