There is only one martial arts novel that meets this requirement, Cao Ruobing's Eye of the Devil, and this kind of internal skill is called "magic capacity turns to bone". Content abstract: Fang Tianyi, a martial arts master, has a pair of divine limits to distinguish between right and wrong and between true and false. Someone suggested that he change his eyes with Qing Ping Jian, and Fang Tianyi suddenly disappeared. In order to expose the plot and eliminate the Wulin disaster in the Central Plains, the master of the Magic Palace, presided over by a group of girls with superb martial arts, inherited his father's unique skills in fencing and calligraphy from an early age. However, Fang Ying is supported by justice and faith. He is smart, diligent and clever. He is good at using the contradictions of various rival factions, and has experienced the hardships of eighteen disasters and the temptation test of many beautiful days, all of which have saved the day. Finally, with the concerted efforts of Qi Xin from various factions in Wulin, the plot of "Tianxiangyuan" to dominate Wulin was crushed.
I have read this book twice, which is very good and absolutely correct.