Male lead: A cold, powerful modern special forces soldier with top-tier combat skills before crossing over; after crossing over, he is a thin, down-and-out ancient teenager with a decisive, ruthless personality, super-high IQ, forbearance, dominance, and a clear sense of gratitude and resentment. The system has no nonsense, activates in seconds, has clear tasks and heaven-defying rewards, unlocking skills for beast language communication, beast obedience, animal reconnaissance, beast combat, and all-beast body protection.