A new menace is looming in the expansion. Powerful and ominous roots have emerged and seem to be taking control over the minds of friends and foes alike. Fortunately, a new hero has arrived, and players can now add Big Khan the moose to their squad of mutants. He is not only skilled at landing critical hits but comes with the unique mutations Ground Pound and Flame Puke, giving the option to apply a more diverse playstyle in order to succeed.