Kayn Dark Star/Cosmic Reaver Skin idea

I just had the thought while talking with a friend about champs that should have a dark star skin and Kayn came to mind. Imagine if you start off a more human-looking model with some particle effects off the "corrupted" part of base Kayn, but then you really change with the transformation. If you were to choose shadow assassin, the model changes to be more along the lines of the Cosmic skin line and if you were to choose Rhaast the model would change to be a Dark Star style monster. That would be a super awesome skin imo. Easily made into a legendary skin.