This mental mutation can reduce an opponent’s mutational capabilities, eventually removing all forms of mutation and returning it to its original, unadulterated form. On each round after a successful mental attack with this mutation, the target has one mutation removed permanently (randomly determined), until none are left. Rarely (5%), this power allows a powerful mutant to regress a pure specimen further down the evolutionary line, to a previous stage of its evolution. For example, a pure human might become a dimmer-witted Homo erectus, and onward. This attack may only be attempted for the duration of one encounter, whether it succeeds or not, and cannot be used again for 1 week.