The Pact of the Fiend as presented in the Player’s Handbook assumes the Warlock’s power is derived from that most powerful and influential fiend of all, Asmodeus, lord of the Nine Hells.
But the multiverse is a vast and dangerous place, populated with a staggering variety of powerful and malevolent beings, many of which have deep histories and large personalities of their own.
In this supplement, you will find lore on 28 of the most powerful (and colourful) devils and demons that populate the lower planes, information on what kind of Warlock they commonly attract, alternative spells they could provide their servants (willing or, as is more often the case, unwilling), and even suggested pacts and invocations for extra flavour.
This information is intended to serve as a resource for both players and DMs, shedding light on some of the more interesting big bads of the D&D universe, while also giving any aspiring Warlock a multitude of interesting options for roleplay and gameplay!
You will need access to Xanathar’s Guide to Everything and Tasha’s Cauldron of Everything to get the most out of this supplement. In addition, some spells have been taken from Acquisitions Incorporated: these are replicated in the appendix for ease of reference!
- from the publisher's blurb