The Chaos Grand Alliance is the vast, corrupting banner that gathers every mortal and daemonic servant of the Dark Gods bent on drowning the Mortal Realms in ruin. It is the force that shattered the golden Age of Myth and conquered nearly all creation during the Age of Chaos, and it remains the single greatest threat to every other power in the setting.
Beneath its banner march the daemon legions of the four great Dark Gods and their mortal worshippers, from the blood-mad followers of the Blades of Khorne to the plague-ridden Maggotkin of Nurgle, the ever-scheming disciples of Tzeentch, and the excess-driven cults of Slaanesh. Above them all towers Archaon the Everchosen, who rules the Eightpoints and seeks not merely to conquer the realms but to unmake them entirely.
Yet Chaos is riven by its own nature. Its gods despise one another, its champions betray their allies for a scrap of favour, and its very essence rewards ambition and treachery over loyalty. This endless infighting is the alliance's great weakness, for a host of Chaos is as likely to turn upon itself as upon its enemies. Even so, its sheer scale, its immortality, and its patient malice make it a doom that can never be fully destroyed, only fought to a standstill and, perhaps, held at bay for another age.