Op Credit

From FFXI Wiki

Op Credits are necessary to participate in Campaign Ops. One Campaign Op can be done with one Op credit. To receive Op Credits, players must be a member of one of the three factions Republican Legion's Fourth Division, Knights of The Iron Ram, and The Cobras. Op Credits recharge at a rate of 24 Earth hours, or 10 minutes if in possession of "Rhapsody in Mauve". Players can hold one at a time and they can be stored by NPCs up to seven. The timer for accruing Op Credits continues to run even while holding maximum Op Credits while in possession of the Rhapsody in Mauve.