The alchemist's mutagen now grants a +4 natural armor bonus, a +6 alchemical bonus to one mental ability score (Intelligence, Wisdom, or Charisma), and a +4 alchemical bonus to a second mental ability score. The alchemist takes a –2 penalty on both associated physical ability scores as long as the mutagen persists, and takes 2 points of ability damage to both associated physical ability scores when the cognatogen ends. An alchemist must be at least 12th level and must have the cognatogen discovery or class ability before selecting this discovery.
