My System Starts with King of Fighters Sign-In

Su Bai traveled through the world with the sign-in system of all realms. He had magical skills, magical elixirs and artifacts. He only needed to sign in with one click. Goddess, saints and witches threw themselves into his arms. The emperor of heaven, gods and demons fought to become his younger brother. The so-called geniuses, please practice hard, otherwise, how can I show my strength when I beat you? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.