Although heirs to similar arcane bloodlines may share commonalities, the unique circumstances in which a bloodline enters a bloodrager or sorcerer’s lineage can result in the manifestation of particularly strange or unusual bloodline powers known as mutations. Whenever a bloodrager or a sorcerer gains a new bloodline power, she can swap her bloodline power for a bloodline mutation whose prerequisites she meets. Once this choice is made, it cannot be changed, and a bloodrager or sorcerer cannot swap a bloodline power that she has altered or replaced with an archetype for a bloodline mutation. A bloodrager need not be in a bloodrage to use her bloodline mutation powers. Alternatively, a bloodrager or sorcerer can select a bloodline mutation in place of a bloodline bonus feat, provided her class level is at least equal to the level of the bloodline ability the mutation normally replaces.
Pathfinder Player Companion: Magic Tactics Toolbox © 2016, Paizo Inc.; Authors: Alexander Augunas, Steven T. Helt, Thurston Hillman, and Ron Lundeen.