Not content with perfecting her body through natural methods, a mutagenic mauler resorts to alchemy to unlock the primal beast within.
At 1st level, a mutagenic mauler discovers how to create a mutagen that she can imbibe in order to heighten her physical prowess, though at the cost of her personality. This ability functions as an alchemist's mutagen and uses the brawler's class level as her alchemist level (alchemist levels stack with brawler levels for determining the effect of this ability). A mutagenic mauler counts as an alchemist for the purpose of imbibing a mutagen prepared by someone else.
At 6th level, a mutagenic mauler gains a +2 bonus on damage rolls when she attacks in melee while in her mutagenic form. This bonus increases to +3 at 11th level and to +4 at 16th level. At 10th level, a mutagenic mauler learns one of the following alchemist discoveries: feral mutagen, infuse mutagen, preserve organs, spontaneous healing. At 12th level, the mutagenic mauler learns the greater mutagen discovery.
This ability replaces martial flexibility.
Starting at 4th level, a mutagenic mauler gains additional abilities when using her mutagen. At 4th level, she gains low-light vision and a +10 enhancement bonus to her base speed. At 9th level, she gains darkvision to a range of 30 feet and a climb speed of 15 feet. At 13th level, the enhancement bonus to her base speed increases to +15 feet, and she gains the scent ability within 30 feet. At 18th level, her climb speed increases to 30 feet, and the enhancement bonus to her base speed increases to +20 feet. This ability replaces AC bonus.