The first challenge yesterday/today is Dueling Decks. Which is boring but doable for AAA's score (you have to almost win, then let Zenco win a card, and repeat until you get the score you need).
Prize art is not great, as we might expect given the quality of recent item art:
![Image](http://images.neopets.com/items/boo_ddy18_reusingcards.gif)
![Image](http://images.neopets.com/items/gif_ddy18_cardtower.gif)