Hmm... this involves a war, right... are gods directly involved in the war that the answer is involved in?
This is either a very obvious hint or I'm not thinking about it enough I missed the TBM and TBL expansions and I know there are planar conflicts there accessible through PoP zones, but wars?... Being accessible through PoP also rules out the wars happening in SoD, I think... ... does this involve the Plane of War? Since Harris already asked this, I'll wait to ask
So there is an associated quest... but the answer itself is not a quest, nor an item. It just is... Does it involve an anniversary mission?
I'm having a hard time keeping track of all the yes and no answers so I'm gonna make some guesses that might not make sense... But first one: is it the catapult attacks on the mission?