Part of Tribes and Patreon March release. https://www.patreon.com/makingtlon
These set contains a magical/eldritch terrain piece that can be used several ways (24 STl parts). It can be a portal, a magic circle, a dungeon door or, an idea that I particularly like, the hatch of an eldritch vessel! I imagine characters finding it as they follow the trail of dead archeologists: they manged to open it, but not to release the monster in the Obelisk. That's probably going to be the characters' fault. They venture into what they believe to be a dungeon and later find out it is actually a buried vessel. A good starting point for a oneshot, expecially if combined with the rest of the release.
All the models are presupported and test printed.