Publisher's blurb: The Tiefling Treatise brings heaps of new lore and a queer focus for the tieflings of Eberron. Four unique origins are detailed within this fifth-edition supplement, ranging from tieflings influenced by Eberron's planes to those possessing a spark of the divine. For DMs looking to add tieflings into the world, encounter tables are scattered throughout the book for quick and easy implementation. Additionally, the Tiefling Treatise contains information on the Venomous Demesne and sanctuary of Rellekor, providing cultural notes and plot hooks for those looking to visit these tiefling-dominated locales. On the player side, this supplement contains race options that are tailor-made for the Eberron setting. For those looking for more in-depth character notes, culturally-significant trinkets and appearance guides can help you truly integrate your character into Khorvaire and beyond. If you're a fan of fiend-touched, then come and crack open the Tiefling Treatise!