They released a creatures set. The exact wording is “This set is exclusively formed from creature cards for your collection”. Does this guarantee non-duplicates? There is some discussion on this on the Magic The Gathering: Puzzle Quest Facebook page.
I am normally not one to complain unless things are really bad, unfortunately it is at that point. The drop rates on cards are WAY too low. The crystal pricing is too high. That plus the amount of duplicates you get makes it simply not worth it to buy packs, which is basically the only way to get cards. The planeswalker pricing at about 200 crystals is fair, but the drop rates and duplicates situation is not.
If compared to the already too high cost of packs that don’t get you any new content, these packs are way way too high.
I put in a suggestion on 70% packs here https://forums.505go.com/discussion/43059 and would really like to get a comment from developers. The thing is with the drop rates so low it is not possible to even get to a critical amount of cards in the new set. Please comment.