Oh wow. That’s weird. Send a ticket to support
Might have to actually complete the Quest
I have the same issue with Grrilla - says collect 45 cards. I have 46, not counting heroes. But, still locked.
But, I know there’s a quest that has the 45 units requirement. Figure I have to get to it first. But, still working the 8 rare to lvl 10 quest
Pretty easy to understand… You‘ll have to upgrade a legendary card to lvl 12 to unlock the last card. That’s the requirement stated below the lock symbol so you’ll have to fulfill it to get the card. Plain and simple. Cheers, fof