MapleStory Database › Items › Use items › Character Modification › Mastery Book › [Mastery Book] Infernal Concussion 30
[Mastery Book] Infernal Concussion 30
[Mastery Book] Infernal Concussion 30 is a mastery book (character modification) in GMS v271. Sells to NPCs for 1 mesos.
50% chance of increasing the Master Level of to 30.
Job: Demon Slayer
Condition: Skill Level 15+