A guidebook for Devil Busters penned by a leading authority in the field. Increases your progress in the Weapon Knowledge expertise.
*Effect is boosted when under the effect of an Incense of Mastery.
*If expertise progress cannot be increased any further, item will disappear without doing anything.
*If expertise progress has been locked,item will disappear without doing anything.
[Modification Material] SLA ATK 3
Bonus: Slash Attack Skill Power Up 15%
Compatibility: Close-Range Weapon (Slot 4)