From the Looney Labs webstore:
Now you can add your own zany ideas to the crazy game of Fluxx! Our most recent version of Fluxx Blanxx contains ten cards:
1 New Rule
Cards are in the new style with just the stripe of color. Card backs for all Fluxx games (except for international versions) match, so you can use these in any deck. Just grab your trusty permanent marker and customize the fun!