Just saw this on the AEG's Phase site...
By special arrangement we have partnered with DriveThru Cards to enable you to make your very own totally legal Phase cards!
At DriveThru Cards you can mix and match any cards in the Phase system, making your own custom selection of two-sided Phase cards.
These cards can be used in any Phase play format from casual to competitive. And we expect you to find all sorts of clever ways to break the game as a result. Boy howdy, do we!