Skin Award Achievement
So get this. What if once you buy all the available skins for a champion, you are given the ability to use any skin you desire...in game. At the fountain, you can choose to switch to a different skin (all of which you have) and have a cool-down or something implemented so people don't just switch it every time they back. Just a thought; not sure on how this would affect the gameplay or any bugs that might arise from doing this. But I think this would definitely make people want to buy more skins and "collect them all" for their favorite champion. Thoughts?