Secret Mastery Book
Secret Mastery Book, GMS v271, Valor en NPC 1
Use it, and it will change into a Skill Mastery Book. However, you won't know what Skill Mastery Book it will become until you use it.
Secret Mastery Book, GMS v271, Valor en NPC 1
Use it, and it will change into a Skill Mastery Book. However, you won't know what Skill Mastery Book it will become until you use it.