From publisher blurb:
Hidden away from prying eyes, the faithful of the Righteous Plague gather in their unholy places. They call on him by name, and entreat him to send his diseases and blights to their foes. They call on him by name, and beg to be reprieved from his epidemics. They call on him by name, and plead to be spared from the ravages of the plagues he bestows. They call on him by name...
BUBONICA
...Chaos God of Disease, Plague, and Pestilence.
Described herein with his adherents for First 5 Fantasy Roleplaying and other Basic OSR games.
This 24-page 5.5" x 8.5" booklet includes a new Chaos God perfect for your new homebrew setting or incorporation into your existing campaign, along with several new monsters and spells to bolster Chaos cults, and a cult hide-out mini-dungeon perfect for an evening's play.