How about we get into a spiritual character similar to kayle and morgana only with a twist inversion

So i was basically thinking while playing kayle today it would be cool if we could have a hybrid angel and demon thing. Only with a passive known as inversion and outversion or simply put regular version. the demon side could be inversion and outside version can be an angel but let there natures completely changed when in these forms. Now if most of you don't know what inversion form is it's a reversed form of a creature meaning opposite of real nature. Such as angels when they transform they can go in and out of inversion and that's what makes angels pretty cool and scarry just hoping to just create a new idea lemme know what you think.