Due to his complete control over his own reforged body, the deviltiger can choose to acquire (or lose) any number of wyld mutations at will(reflexive non-charm action), and never again gains a mutation simply due to being in the Wyld. (same goes for any other passive mutagenic effect, such as the blightzones of autochthonia)

this may be stunted in order to avoid crippling injury(although you still lose healthlevels to the damage), such as turning a disembowlment into a maw and tentacles combo an sucking the intestines back in before sealing the mouth over.  A second puchase allows such stunts to downgrade agg to lethal.