My players have just finished with the mass slayage that was the Spire of Long Shadows. After making a pit stop in Sasserine, and completing some left over business, they are going back home to Alhaster. But the one Cleric of Wee Jas was going to pick up some packages for a certain Halfling Merchant woman, who lives in Rooksroost (Mizen Mitchwillow).
I had not done much interesting with the packages that they were going to take to Mitchwillow, mostly some rare woods, spices, and other goods that she had them trade for some similar, Northern, goods that they had taken down with them. But I got to thinking, I should have a less than scrupulous noble or merchant (perhaps Nemiem Roblach or Vanthus)hand them two magically sealed boxes to take to Mitchwillow and some other merchant in Alhaster, two Shadow Pearls. I would have the Sasserine fellow show them their cargo and then magically seal the velvet lined strong boxes, paying them 1,000gp to take them North.
I figure this is a nice way to set up some unknown foreshadowing about the next AP, that I plan to run next year or so. It will be especially cool because neither of my players know anything about the next AP except that it has pirates, high seas, cool adventures, and the Isle of Dread. So it will be like 6 months or more until they see a shadow Pearl again, but when they do they will realize that their characters from the last game helped spread a secret horrorm to the hometown that by then they (the old AoW characters) now rule.
I figure it will be a cool moment and will make their cargo a bit more interesting.