Deadlands--Follow the Walkin' Man
Horn of False Plenty
After losing her family to starvation, Gant gave Jenny Garrett the Horn, which allowed her to spontaneously create all the food she could ever want. She did so, luring over innocent citizens of Alderman’s Creek to the ruins of Leafton, where they ate of the Horn, becoming Ravenous Horrors in service to Gant.
The PCs confronted Jenny, Gant, and the Horrors while in Leafton, driving off Gant and destroying the Horn.