The Sinkhole - Dungeon Magazine 103

What if an inn got sucked into some caverns that were part of the Shadow of Ptolus?

The scenario as written involves an inn falling, mostly intact, through a sinkhole into a cavern infused with the plane of shadow. Instead of a sinkhole, what about a magical translocation? 

Such an event would certainly fit into the lore of the setting. You could develop any number of reasons and make them plot hooks for something bigger.

The translocation of the inn turns it into another location behaving just like Kadmiel the Shade Tower. It doesn't exist in the real world, but occasion ally casts a shadow of itself on bright moonlit nights.

Among the many dangerous encounters are also hazards like pockets of gas, cave-ins, and any number of shadow related afflictions you could invent and apply.

The goal is to get everyone out of the shadow caverns and back to Ptolus proper. The hungry shadow infused monsters have other plans.

The adventure assumes the player characters are staying at the inn when everything starts. They could be there for any number of reasons, meeting a client, seeking information about something else they are investigating, etc. This works as a drop-in (pun intended) concurrent with other plot threads.

Strange effects for spellcasting would be appropriate with anything shadow or illusion related. Light could be dimmed. 

Going back to the Why?:

1) There could be someone at the inn that is a target of someone powerful enough to have the inn and everyone present shunted into the Shadow of Ptolus. Could Renn Sadar be involved somehow? It's unlikely he would be the target or even present since as powerful as he is and as connected to shadow magic, the PCs wouldn't have much work to do (unless he was in a coma the whole time).

2) Maybe a magic item is present that causes the shift.

3) Could a deity be behind it? Maybe Destor pushing his luck?

4) For some unfathomable reason the Soul Riders took control of half a dozen of the mightiest spellcasters in the Inverted Pyramid, including Renn Sadar, to work a ritual that threw the inn and occupants into the Shadow of Ptolus. They'll only vaguely recall bits of their actions and aren't likely to admit lacking control. The Soul Riders may want access to something within the shadow. If one of your players is absent you may want to use them as an NPC under the control of a Soul Rider. Perhaps that character is present when the shift into the Shadow of Ptolus occurs and is there to get whatever the Riders are after.

Escape as written is as simple as finding a certain cave-in and digging out, but for our purposes that would not be in keeping with the Shadow of Ptolus, and much too simple. Alternately you could let them dig out a passage into the second level of Kadmiel, the Tenebrous Abode, but that still isn't a way out. Spells like Plane Shift, Gate, and Etherealness, or items that work similarly could allow exit.