Do I really have to grind out M'Kran Crystals 15 at a time?
This shit is going to take a fucking month and a half
What do you need them for?
You get at least 40 a day if you run all the X-men missions (which you should even after you've maxed them because they guarantee a character drop).
Oh, sorry, those are shards. Do you have Magneto unlocked? Unlocking him unlocks extra missions where you can get feathers and mkraan crystals. You'll be swimming in them soon enough anyway because they're capped and there aren't that many x-characters, but I know early on that's one of the big draws of buying Magneto (the huge deal being later on when you can unlock Jean)