It's really frustrating to see that two of our best Duo-element ideas IMHO, Timerclock's Dual-Element Series and my Duality Series have come up... and hit the archive. Also, it's also come to my attention latley that newer card designers are not aware of this fact and that Dual-element cards will end up being continously proposed.
So I was thinking - should we make a Collaboration that focuses on making Dual-Element cards? It's pretty clear that the mechanic is well supported by people, but the problem is that the cards being suggested don't always come out well. With a collaboration we could probably take all our experience learned from making these cards and then create a series that is unique, Duo-elemnent, and acceptable for the game's mechanics.