It is completely normal for cultivation techniques to have flaws.
In fact, techniques that cannot achieve instant elevation or lead directly to eternal life are all considered imperfect. When compared to other substandard techniques, the Taiyin Killing Momentum Dao was more than qualified to be called exceptional.
Furthermore, the person who created this technique was the Imperial Tutor—a woman of astonishing talent, a mortal goddess who originated from Yunzhong Pavilion, the most mysterious immortal cultivation sect in Wu Zhou. Hu Er, who was hailed as a peerless beauty alongside her, had never disappointed Lu Bei. Qingqiu immortal arts could either slaughter dragons or tame them, and every single technique was divine. The Taiyin Killing Momentum Dao practiced by the Imperial Tutor herself could not possibly be bad.
Chapter 281