The rings of the Horsemen are rings that each of the Four Horsemen of the Apocalypse wear that allows them to channel their essential abilities, although some powers like teleportation, can still be executed without it on. They prove integral in the apocalypse. Brady describes War and Famine as "withered husks" after the removal of their rings. Together, these rings form the key to Lucifer's cage. The Archangel Gabriel told Sam and Dean this secret, and after acquiring all four rings, the brothers used them to re-open the Cage.