Well it used to be fun. But now if you don't have a lot of cash to throw at it. You're not getting anywhere. CO-OP IS JACKED UP NOW! Only four Keys the day. You just cut off the legs of all the F2P players that use this method to get gold to pay for upgrades. U give bad rewards period Legendaries used to upgrade with the cards and gold. So 2 get a legendary 2 level nine now is two cards, gold, six crystals (or trade 3 legendaries for'em). Plus 1 more legend in the same faction to upgrade. DUMB