Skystone Subterrane aka The First Dungeon Adventure

I was challenged by the Living Urf Gaming Club to shut my mouth and run something. Big Mike laid down the command that it be in September, and even offered the sweet deal of a Wish for completion of the task. Since the idea I had in my head involved the full moon, I found my deadline looming ever closer. What's worse? I was dealing with spider bites that lead to a pretty bad infection. We persevere!

The Skystone

 “We know little of the Skystone. It appeared during a storm in the new moon, and remote viewings have revealed windmills across its southern edge. No contact has been received for whatever inhabitants may dwell there, but it has drawn the interest of astrologers and druids due to a strange phenomenon. On moonlit nights, a shimmering stair can be seen connecting the Skystone with our own lands, though attempts to ascend it these past weeks have been for naught. Soon the moon waxes full and we shall see if my own theory holds. If so, this expedition may be worth a shift in my own research.” – From the notes of Magister Marcus the Mad.

Big Mike gave me a lot of freedom in the setup; I could choose the theme and design without worrying overmuch about the current Urf milieu. Moreover, I added a request that any PCs across the campaigns have access to it. This offered the opportunity for convergence and permanence, and avoided the "one shot" situation. No one shots! Campaign only!