According to his calculations, he had to wait until his own cultivation reached the Nascent Soul Realm, and he had to cultivate the Blood Melting Demonic Technique to the Great Perfection Realm.
Moreover, engraving the Visualization Image would greatly consume his own spirit and soul power, making it a true bitter labor.
Even this pirated demonic cultivation method nearly left him bedridden for half a year.
Fortunately, with the help of his two cultivation partners, Yulan and Luo Han, his recovery speed greatly improved.
This is also why high-rank cultivation methods are precious and easily lost.
Who would take the trouble to do this unrewarding work for no reason?
The latter's Soul Burning Life-Shortening Technique was a demonic secret method that Li Liangyu used to seek revenge by consuming potential and overdrafting his lifespan.
He didn't really want a disciple, only consumables, and the cultivation realm had to be enough.