Extracting energy was extremely simple for Yi Yun. However, injecting the energy into the golden rune required some Desolate Heaven technique knowledge.
He had to understand the reasoning behind the golden rune.
But, with the help of the Purple Crystal, this was not much a problem for Yi Yun either.
Back when Yi Yun cultivated the 'Tai Ah Sacred Technique', the process of drawing the picture of the sun using pure Yang Qi was a hundred times more complicated than infusing energy into this golden rune. Even so, Yi Yun had managed to complete it.
It was easy for Yi Yun to just copy the process mechanically.
But, Yi Yun was not satisfied with just that. While he was drawing according to the golden rune, he made sure to understand why the rune was drawn in the manner it was. He had to understand the reasoning behind the golden rune or he would never become a Desolate Heaven Master.
