@Vika Nooo.. Not like after very 10 days or something, I mean it has to be a while.. A good maybe 25-30 days.. You know, since they are very rare, it has to take a while.. (30 days after your first pink)
You know what would be nice.. If after every so many consecutive days of playing, we get a white crystal, then it starts back over to pink crystals.. :D
I could not even get past a certain wave, my allies were not even coming out..? WTF!! I was a one man army against about a million people.. Get a better spawn.
 "Dream World"){kind=icon}
 "Champion"){kind=icon}
 "Cursed Treasure: Don't Touch My Gems!"){kind=icon}
 "Ultimate Crab Battle"){kind=icon}
 "me and the key"){kind=icon}