When Billy used the same amount of mana in his brain, he felt his mind getting sharper, but that wasn't the only thing that changed. The system recognized that as a skill, it was really weird.
You learned the skill Sage's Wisdom.
Sage's Wisdom: It grants you five points of extra in magic per level.
Billy just learned something that he wanted for quite a while… a passive skill that could boost his parameters. It was weird that he learned a passive skill by using mana, but he assumed that he learned that because he boosted his brain's power. So, it seemed that passive skills could be learned after reaching some requirements, like when he gets stronger by using mana. That was good and all, but it didn't solve the thing that Billy wanted to solve.
"I will have to keep thinking about this…" Billy thought when he went to sleep.
