Does it have to be a novel? If it could be a manga let me know... Do tournaments count? Or does it have to be gladiators?
Not really into manga, though, now that I think about it, if anyone one of you know about a gladiator anime then that would be awsome too
Yeah it's called shadow skill here is the wiki for it if you want to browse it https://en.m.wikipedia.org/wiki/Shadow_Skill
I saw something about it once, but something (don't remember wat) made me not watch it. Was a long time ago though and forgot about it so I'll probably go check it since u mentioned it