Life/Death Champion

When I get really bored, I start to draw out champions with ideas going along with them. There is a champion that I had an idea for. Their power and appearance would go hand in hand. I haven't really thought of everything they would be able to do but a general idea. The idea for it would be that they could either be like a support character or an ap character. Either all, or most, of their moves would have a chance to go both ways. They could either give their health to a teammate or they could life steal from an opponent. The more they use one of them, the stronger that one gets and the weaker the other one gets and while they keep using their powers, their skin changes. If they are doing life steal, they will look more like a full person and their healing abilities weaken. If they are giving their life to their allies, they will start to look more like a skeleton, and their life steal gets weaker.

For the appearance I was thinking of some kind of animal with long fuzzy, pointed ears, so they would look like creature when they were fully skinned and then a demon (their would be horns under the ears) when they are support. Backwards, but it makes sense if she is giving her life away that she would slowly look like a skeleton.

This is about all I have for this character and I'm not the best with describing things, but I thought the idea would be pretty cool. Just wondering what other people thought. Or, if they had some cool ideas. I'm also not sure if I posted this in the right spot.