During combat you have a chance to become consumed by Fanatical Inspiration, increasing your highest secondary by X for 15 sec.
Party members also equipped with the keepsake have their lowest secondary increased by X for 15 sec.
During combat you have a chance to become consumed by Fanatical Inspiration, increasing your highest secondary by 1.1242 × SP for 15 sec.
Party members also equipped with the keepsake have their lowest secondary increased by 0.1125 × SP for 15 sec.