During the Fall of the Aeldari it was enveloped by the Warp explosion instigated by the birth of Slaanesh and the massive amount of Warp energy that bathed Eidolon at that time has twisted it beyond all recognition.
Like the state of Chaos itself, the land mass of the Daemon World is in a constant state of flux and is divided into four separate empires, each one claimed by one of the Chaos Gods and ruled by a Daemon Prince. Each of these realms wage eternal wars against one another.
Eidolon is also supposedly home to many valuable, ancient Aeldari artefacts dating back to the time of the Fall of the Aeldari.
- Bloodquest (Graphic Novel Series)
- Eye of Terror: Worldwide Campaign