Sorry to hear that, not sure if you will see this.

I just completed the achievement successfully today, Jan 22nd, 2025. I followed the steps in the article and got through all 4 puzzles. Hope you can unlock the card back!

Happy to say this guide still works as of January 22nd, 2025! Did this right after the Starcraft Event launch too, I am now the proud owner of the Mysteries of the Phoenix card back.

I was able to successfully play the ??? card to enter the puzzle for each class properly after playing the 5 specific spells in a single turn together. The article covers everything you need to pay attention to in order to do this right, lots of room for small mistakes. Fool-proof way is to repeat exactly as the videos show.

Definitely agree with the article when it recommends copying the list of steps onto your own device and literally crossing them off / deleting them after completing. Druid and Hunter puzzles require high focus not to lose your place, thankfully I did not have to restart either.

Also, I saw on other forums people were having trouble triggering the ??? spells to enter their hand in order to reach the puzzles in the first place — if this is you — try to copy and paste the decks in this article exactly, this is what I did and none of these cards seem to create any bugs for completion. If you are short on dust, you can technically only craft one of each 5 required spells, but you will need to draw out more of your deck in order to play the combo, most likely.