Deep in the Plane of Limbo, a chaotic domain existing between the realms of life and death, dwell formidable entities. These beings, though long deceased, possess an enduring life force that perseveres throughout the ages. For countless centuries, nay, millennia, they have diligently sought a pathway back to the material plane. They observe and study the intrinsic power of the soul, the essence of a creature's life force. And through their observations, they have discovered that a creature's life energy holds immense potential as a source of power, capable of transforming the very essence of life into a force that can bring about death.
Unlike other warlock pacts, where abilities are granted by Patrons, the Pact of the Possessed Warlock entails a unique process. Typically, the agreement forged between the Warlock and their Patron involves the Warlock surrendering their body to the Patron after a predetermined period of cohabitation. The Warlock's abilities are unlocked from within as their Patrons enter their body, establishing a symbiotic bond.
These Patrons are formidable entities existing without a physical form. In this partnership, the warlock cannot solely rely on their Patron's life energy; they must also contribute their own. The Pact of the Possessed uses both of these life forces as valuable resources, sacrificing vitality in exchange for power. This path treads the fine line between absolute power and absolute destruction.
- from the publisher's blurb