Although alluded to in their first appearence, the Eyrie of Evil was first named and shown in somewhat detail during the Secret Society of Supervillains' invasion of Earth-Three. The headquarters of that world's most powerful organization of metahumans, it had long been abaonded due the imprionment of its occupants the Crime Syndicate after the Syndicate's battles and defeat at the hands of the Justice League and Society of Earths One and Two. A mountain retreat secluded from the eyes of public, it was a haven for the heinous. When they were free, that is.
Firestorm and The Defenders
45 minutes ago