From publisher blurb:
Explore Bridgid's Acolytes, a young alchemical cult that is playing with fire in near every sense of the word. Inspired by ancient Celtic Mythology, the Acolytes mingle neopaganism with a terrible, terrible misunderstanding of the Divine Fire, creating Pandorans every year on a special feast day. Yet to turn to hunting Prometheans directly, they are an opportunity for the Throng to nip an alchemical hazard in the bud- by diplomacy, or by force.
Includes an array of story hooks for using the cult in your Promethean: The Created Chronicles, two Spring-themed antagonists, the cult leader Bríd and one of her erstwhile creations, a new Merit for cult membership, and details of the Imbolg Rite, a dread means for drawing out Pandoran horrors from the Otherworld, or so the cult believes.