The Seven Great Demon Lords (七大魔王 Nana Dai Maō?) are a group of Demon Lord Digimon who each represent one of the seven deadly sins. They are based on various demons from within Judeo-Christian mythology, a reference to Peter Binsfeld's classification of demons, most notably Paradise Lost by John Milton and Clavicula Solomonis Regis, an anonymous 17th-century grimoire. There are also two "Super Demon Lords" who are closely related to the group.
The Seven Great Demon Lords are the chief nobility of the Dark Area and each member has the right to command legions of the "Nightmare Soldiers", if they so wish. They are also able to subvert the cycle of reincarnation presided over by Anubimon—instead of having the chance to be reborn, the data of their victims becomes their own flesh and blood. Despite their might, certain other demonic Digimon, such as GranDracmon, are powerful enough to stand outside their authority. The now work for Marauder as his Knights of Darkness.
Long ago, the Demon Lords almost brought ruin to the Digital World. However, they were stopped and reverted to Digi-Egg form, then sealed away to be forgotten.