The Pact of the Chain is a significant agreement in the lore of the tabletop role-playing game Dungeons & Dragons. It is primarily associated with the Warlock class, allowing them to form a bond with a familiar, which is a magical creature that assists the Warlock in various ways. This pact enhances the Warlock's abilities and provides unique options for gameplay. In the context of the game, the familiar can take various forms, such as a bat, cat, or owl, and serves as a companion and source of magical support. The Pact of the Chain emphasizes the connection between the Warlock and their familiar, highlighting themes of loyalty and partnership in their adventures.