Smash Up: Cease and Desist - Rules of Play says:
Like most of the current smash up expansion, Cease and Desist includes four all new factions for players to include in their game - Astroknights, Changerbots, Star Roamers, and Ignobles - 22 cards for each faction. Play them against each other or shuffle them in with any other Smash Up decks and see what these new faction can do.