Orc "Ay Vaz" Mission stuck

[Rork]

Originally Posted by ckdamascus

You need this mission to get the Ink item (don't destroy or sell it) which is needed for another mission.

Is this the Ink item? I found in on Merlassar, the very first merchant you run into once you disembark.
I don't mind spoilers, so I'd like to know when it will be needed as I've just defeated Guilford after the demon lands - PM me if you think others have low-to-none spoiler tolerance .