Just wondering if anyone has figured out exactly what the pin sparks are and when best to use them. I currently have 52 out of 135 sparks and 33 pin sparks (duplicates) so I can open the first chest. Has anyone opened a chest yet? I'm wondering if there is a strategy and since it's such a new feature maybe some of the testers have advice. For instance…if it gives you a limited booster (5 mins or so), does it make sense to take it prior to a legendary level.