MapleStory Database › Items › Use items › Character Modification › Mastery Book › [Mastery Book] Rush
[Mastery Book] Rush
[Mastery Book] Rush is a mastery book (character modification) in GMS v271. Sells to NPCs for 1 mesos.
This increases the master level of up to 20 with 70% of chance.
Job : 4th Advancement Warrior
Condition : Skill level above 5