My sister-in-law has extraordinary comprehension; she's actually a saintess of the demonic sect

[Martial Arts Universe + System + Stat Allocation + Invincible + Decisive Killing + Wei Wu Legacy] Upon waking, Yang Qian finds himself transported to a chaotic world of martial arts. This world is divided between dynasties like Qin, Tang, Li Yang, and Bei Li, while powerful forces such as Snow Moon City, Martial Emperor City, the World Society, and Yi Hua Palace dominate the martial arts world. In this era where aristocratic families monopolize cultivation resources and treat ordinary people like dirt, Yang Qian is merely a poor, precarious commoner, also caring for a beautiful, frail, and helpless sister-in-law. Harassment by thugs? Oppression by the powerful? Life or death on the line? At the crucial moment, the **[God and Demon Stat Allocation System]** awakens! "Cultivation speed too slow?"—Activate ten times the cultivation speed, perfecting basic internal skills overnight! "Cultivation technique too weak?"—Obtain a mysterious human skin map, unlocking the ancient god and demon inheritance, "The Seven Limits of Devouring Heaven and Earth"! "Enemies too strong?"—Deep Blue, give me stat allocation! Strength +99999! Yang Qian rose from humble beginnings, protecting his sister-in-law, destroying powerful clans, traversing the martial world, and shattering the void! Yao Yue: "Yang Qian, the Yihua Palace is willing to acknowledge you as its master!" Li Hanyi: "Yang Qian, I've lost, and you're yours now." Wanwan: "Yang Lang, my Heavenly Demon Dance is only for you to see~" Years later, Yang Qian stood atop the imperial city, with countless demons bowing behind him and nations paying homage beneath his feet. Yang Qian: "Sister-in-law, look at this picturesque land, now it all belongs to the Yang family!"