So I was reading about Umbra on the forums apparently It is a weapon with a soul in it. This got me thinking, How cool would it be to have a weapon or two that held some kind of demon or benevolent being that you can talk too if you want to ( thanks ofnir123 ) and get its opinion of the current situation or a quest. The Evil one would have a thirst for battle and killing and would react to such things by getting stronger or maybe transforming also it would maybe give you dreams or visions possibly able to posses you and give you powers. Or maybe the benevolent one would do the same things but through good deeds or slaying evil enemies? This weapon would have to be extremely hard to get for one.
Maybe if implemented right this could be good?
I remember Dawn Fang transformed if you slew enough enemies in a day or something, that was really cool.
Anyways I am sure you guys will have better ideas than me so please share your thoughts and ideas.