Oh, there were immortal tigers and vajra, who killed the Reincarnators at the beginning of the game! From the golden horned beast devouring the heavens, the Myriad World Mad Python, the million beasts behind him, the devouring abyssal dragon, the reborn great ape king, these novels all had plots where the main character was reborn into a beast! I'll recommend you to take a look ~ I hope you like my recommendation. Muah ~