Grimoire stones are items that allow you to use skills from other classes and monsters and equip weapons that are not normally allowed to be equipped. Each stone may have one to seven skills that range from level 1 to 10 and an equipment bonus.
During battle, a grimoire chance may appear when selecting commands. If the character is alive at the end of battle, you may receive a new grimoire stone. The stone will contain skills that the character has learned and/or skills from the monsters fought. The character's skills will not exceed the current level, but monster skills can be any level.
Grimoire stones are managed at the guild house. When they are brought in they are removed from the inventory and the skills are identified. Up to 99 stones can be stored at the guild house. They can be discarded by pressing 
.
Grimoire Synthesis[edit]
Three grimoire stones can be synthesized to form a new stone. They are selected in the following order.
- Base
- Determines the number of skill slots.
- Supplement
- Skills are selected from both the supplement and base.
- Catalyst
- Determines the equipment bonus.