This expansion to Reiner Knizia's Blue Moon adds 30 new cards. The Aqua feature cards that are protected from the effects of opposing cards, and the potential to bring about a powerful flood that will force their opponents to retreat.
Did you think to put your cards in card sleeves? And then what? Where do you put them now? The original box will not be able to hold them anymore so this is one box to carry the Aqua around, while the cards are well protected inside those sleeves.
Just print this PDF and cut along the edges and use double sided tape (I worked this is to be the best method but YMMV) to put them all together.