From Gamer Escape, the free Final Fantasy XI encyclopedia
- Lowers defense of enemies within area of effect and gradually deals Light elemental damage.
How to Obtain
- Please take note: The first place nation's merchants will only sell the spell to citizens of that nation.
- Diaga gives Dia effect.
- Dia / Bio Priority
- Dia and Bio do not stack.
- Dia < Bio < Dia II < Bio II < Dia III < Bio III
- Any "greater" magic will always overwrite the "lesser" one despite the time of casting.
- Note: This is not necessarily the case for player characters who have been hit with both spells.