The Obsidian Age is a Justice League storyline written by Joe Kelly with illustrations by Doug Mahnke. It's Kelly's second arc on the JLA series, following his debut arc Golden Perfect and leading into Rules of Engagement. The story deals with the disappearance of Aquaman and Atlantis in the aftermath of Our Worlds at War. In the collected edition it's published in two volumes, including the two-part prelude in The Destroyers.