The mutant becomes a Chaos Were. It now has two forms.
Generate a random Chaos creature using the procedure set out under Chaos Spawn, but only give it D6 Chaos attributes. Keep a separate record of this creature, including a separate record of fear points, as it is the mutant's Chaos were-form.
The mutant gains 2 fear points when it changes into its were-form. These points are added to the fear point total of the were-form, not the mutant's 'normal' fear point total. This may alter the psychological effects it causes in its opponents.
Every time the mutant gains a new Chaos attribute, the were-form also gains an attribute. This must be separately generated and, therefore, will rarely be the same for both forms.