Cosmic reaver/dark star kayn

Just a thought, base kayn he looks like a person with a slick cosmic reaver scythe and when he transforms he either goes full cosmic reaver like the yi and kassadin skins- with the blues, whites and gold color scheme and constellation themed particles, or he transforms into rhaast, the horrific star harvesting space monster

I think it'd be pretty cool, to themes that are similar in tone but different enough to both be 1 champion is good for a champion like kayn who is constantly between 2 different characters