One new Warlock Patron Subclass: The Empowering Cult.
One new Warlock Pact: Pact of the Chalice - Featuring four new pact specific Invocations.
Three new Spells themed around occult rituals and the gifting of power.
One new NPC statblock for a Cult Warlock.
Suggestions on how to use these materials to create adventure hooks and help the DM improve the dynamics between Warlock Patrons and PC Warlocks.
"Empowering Cults operate by forming links between the souls of individual cultists. This cult pact is not formed between the warlock and a single powerful entity but rather between the warlock and all the cult fanatics who participate in cult rituals.
This subclass is intended for use with the Warlock class as presented in the core rules or in conjunction with the options in Tasha’s Cauldron of Everything. It is an attempt to fill the design space between the existing classes of Warlock and Cleric to enable a DM to create the feeling of the founding and growth of an arcane cult."
- from the publisher's blurb