Not sure. I've taken other iterations in other directions and right now I'm kinda stalled on the project. The other win cons are making a complte cube of 360 cards and defeating all the wizards.
May I suggest example cards showing off different aspects of the game, or other downtime + special abilities? (For example, maybe a more expensive special ability where you could make a spell a "signature spell" (commander but with anything), or a downtime activity where you can do another run with some of the sane cards from your deck for 5-10 coins)