Hello. After the destruction of several cards, I automatically had a quest “Master Crafstman” (craft one mythic card of your choice), for which the reward was 200 crystals.
I created an “GROUNDSHAKER” for the Reds, but the task was not completed. I created one more, but the task also failed. Is this a bug or am I doing something wrong?
Sorry for my English.
The quest Specifies mythic cards (The cards with gold around them).
My best Guess is that you made one of these grounshakers
And not one of these
You can view these cards by pressing the show mythics button in the card crafting place
I would suggest just crafting a mythic farm boy or something and then disenchanting it.
If you did make a mythic groundshaker with gold outlines then it most probably is a bug.
Hope this was helpful 
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Thanks for the help. You were right. I created a card with a gold frame and the quest was done 
