From the Beginning of Doupo, I Became a Monster

The protagonist travels through Dou Po, becomes a monster, and obtains the Ten Thousand Realms System... Traveling through the heavens, Dou Po is just the beginning. (World experience: Dou Po, Marvel, Biochemistry, Naruto, Douluo, Wudong, Swallowing Starry Sky, Prehistoric...) The strongest system in the world: n gold coins are required to sign in every day, and items from the world are randomly selected. System Intelligent Demon Lingling: Congratulations to the host, the sign-in was successful. Obtain a set of Pirate Nami's original bikini, 44 gold coins, and blooming flowers (a perfect gift for lovers) … Ling Yang: Dongdong Yao, these flowers are given to you. Can I buy a favor and sign in again? Yao Yao Ling: Sorry, host, Yao Yao Ling doesn't need feelings or discussion, and it doesn't accept bribes. Ling Yang: mmp! Yaoyaoling, give me back my gold coins...