I came back after couple years (side note: Damn that was a lot of packs :D, shootout for introducing that open all at once mechanic)
I’ve been looking around at the new thinks and I notice that one of the achievements from nathria exp is broken now.
I follow the clues, make that secret deck but it just queue me into regular wild game.
I did some reverse engineering myself and I think I know why it’s happening.
One of the cards is Acidic Swamp Ooze, which you moved from core set to legacy set later. I looked into how was that implemented.
I think the event that triggers the puzzle is listening for a deck with a card with dbfId:69548, which no longer exists, the one we have in collection has dbfId:906.
I spend a lost of $$ and dust to make it 
, could you let me know if and when will this be fixed.