[Mastery Book] Ninja Ambush 20 ([技能書]忍影瞬殺20)

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	[Mastery Book] Ninja Ambush 20 ([技能書]忍影瞬殺20)
This increases the master level of Ninja Ambush up to 20 with 70% of chance. Job : 4th Advancement Thief Condition : Skill level above 5
掉落怪物: 維京