Alright so,

You know when you have all 7 balls and you drop another you get a blank ball. Well can u do anything with them? Ive seen them on Ah and was wondering if i can do anything with them? Or are they craft items? craftable?

I put this in Gameplay discussion because maybe this can go for Kr and HK as well

right click it...see what it does post bout it after

There is MANY threads about this. Search about it before you post please. The conclusion on all the threads is it's just a craft item.