Recover the Modron Accountant
Fortune's Wheel Casino
Shemeshkuh joined the party at the bar and introduced itself as an Arcanoloth (a powerful and important Yugoloth) who owns the casino and is also active as an information broker. One of its accountants, a modron, flipped out and ran away recently. As a manifestation of absolute Lawful Neutral, it shouldn’t even be capable of that. And if happened *exactly* when the players died mysteriously, so Shemeskuh thinks the two might be related. The yugoloth wants the modron back (it has sensitive business information) and if they players retrieve it (its believed to be in the Outlands somewhere, the plane of True Neutral) Shemeshkuh will help the players find out what exactly is going on with this glitch that gave them amnesia.
After some negotiating, the party agreed to help in return for 200gp in casino chips and 100gp in money for expenses, each. Shemeskuh also gave the party a portal key (looks like a golden casino chip) that if the party takes it into a nearby doorway, a portal to Outlands will form.
Research Tower
After some discussion, the Githzeri Scholar mentioned a modron having visited a while back intent on rejoining its branch of the Great Modron March. It had a mimir (a humanoid skull-shaped recording device) it was using to find its branch of The March. The modron found what it was looking for and departed months ago, but left the mimir (apparently the skull the party was carrying). The mimir had been damaged in the Yugoloth attack and wasn’t working.
A couple members of the party with good Arcana scores worked together and successfully repaired the skull, only to find the damage had knocked out its memories of several of the gate-towns. To retrieve where the modron ultimately went, the party needed to visit seven of the gate towns, bring the skull to within 20’ or so of each gate, and then spend a few minutes describing in detail the gate and the area immediately around it.