Cash shop Mastery Guides

Yes, that's correct. I didn't know you were a programmer, otherwise I would have interpreted it the other way:

[Mastery Book] Magic Guard 20
Has a 70% chance of raising the Master Level of the #cMagic Guard# skill to 20.\nJob: Evan\nCondition: Skill must be at least level 5

[Mastery Book] Magic Booster 20
Has a 70% chance of raising the Master Level of the #cMagic Booster# skill to 15.\nJob: Evan\nCondition: Skill must be at least level 5

[Mastery Book] Critical Magic 10 (sic)
Has a 70% chance of raising the Master Level of the #cCritical Magic# skill to 15.\nJob: Evan\nCondition: Skill must be at least level 5