What if Lux shield granted stealth instead of shielding?

I was just curious how powerful would this be, not as a serious suggestion.

Got the idea after seeing some early designs for Lux that had her W grant stealth instead of what it does now as a shield. It also works with her light bending theme and her lore as a Demacian secret agent.

So the mechanic I was envisioning is Lux throws her wand out in a line like normal when it returns back it makes you invisible for a short duration like 1 - 2 seconds or something on a 20 second cooldown, as normal attacking enemies, casting abilities, or receiving any kind of damage breaks stealth. For this to work the wand has to pass through you twice. For balance the stealth should just work on Lux herself.

[sg-lux-2]