Sigh, don't love it when you open your vault and look at how many non diamond keys piling up? And while yes it takes months to get a diamond key its still painful to watch your vault piling up with all these later to be useless keys. What if: We had a way to use them? That's where Key Conversion feature comes in! As the picture shows you, instead of letting those worthless keys sitting up in your vault, how about use a number of them to get yourself a better key? Almost finished with Diamond Fighter but missing two Diamond Keys? Convert 50 Gold Keys for 2 Diamond Keys! Just a thought about it and i felt like sharing it, so tell me what you guys think!