After Joan made the skill to be controllable by willpower, he went again into Troan's soul realm. Replacing the old imprint into his skill tree. Going back into his body and then opened his eyes.
"Did you succeed?" Asked Troan.
"Yes,"
"Then let us test it immediately," Troan suggested.
He tested the skill and he closed his eyes. It was then, he felt that the skill has slower effects or progress. Adjusting his willpower, he made it go faster and faster. Making his mana spent on the process. Opening his eyes, he smiled and blurted out.
"It works! It works now! It is a success!" Troan said to him.
"Good, now take care of that skill. Maybe you can also teach it to other students from now on," Joan said to him.
"Yes, of course. As you have said it yourself, I will teach it to the students from now," Troan said while bowing his head. After bowing, he stand straight then shook hands with Joan.