JALLEN
He was living on a normal planet Earth; there was no mana or anything. So, he only mastered the skills that are humanly achievable. Now, did the system not find all the skills that he previously possessed...possibly. I won't answer because it's somewhat of a spoiler, so feel free to read if you want to find out.
Novel_Manga_2624:Did he only know how to use daggers and walk silently? To be the best assassin in the world, the guy needs to master several other things, he must be something like Batman or Shadow. and is it possible to manipulate mana and acquire skills and powers through study and training?image