Approved.
@Shard So, a question. Are you saying that your sword can ignore invulnerability for beings like Champion or beings with similar durability?
Also, "Holy Magic" isn't really a thing here, so him being weak to holy ground and other stuff doesn't make sense for the setting. Otherwise, it looks good!
<Snipped quote by Shard>
Damn, I think I have a similar idea that would now seem less original :p
Edit: Hmm, then again maybe demons in humans is part of the universe. It gets reinforced by more than one character having it.