MapleStory Database › Items › Use items › Character Modification › Mastery Book › [Mastery Book] Ninja Ambush
[Mastery Book] Ninja Ambush
[Mastery Book] Ninja Ambush is a mastery book (character modification) in GMS v271. Sells to NPCs for 1 mesos.
This increases the master level of up to 30 with 50% of chance.
Job : 4th Advancement Thief
Condition : Skill level above 15