[quote=Card Captor]
Ok, how about instead of a talking sword, he was cursed by a demon. This gave him enhanced strength, but at the risk of him being over taken by bloodlust. I'm trying to make a character who has the potential to be powerful, but has quiet a few hurdles on the path to power
[/quote]

That's basically a cursed human, if we follow the notes on the first page. So I guess that works.

I'm not sure how cursed humans go, so I'll just rely on the GMs' advices for that.