Skill Book
From Ymirheim Wiki
Skill books are in-game items.
To be able to learn new skills and level up already learned in-game characters' combat skills, players must use skill books. Skill books can be bought from Cattleya Organization NPCs, which are located across the in-game world.
Each skill requires a particular skill book. Each skill level requires a corresponding skill book. The skill books use a pop-up tip to describe some information about skills and skill books:
