An "Obsidian Age" prologue, leading into this summer's 6-part bi-weekly storyline! After the events of last issue, the JLA and a host of DC's most powerful mages (including Zatanna, Tempest and Faust) are left to investigate the raven-black magic that is still stirring near the Atlantic Trench, former resting place of the undersea continent of Atlantis. When the continent itself is suddenly found above the waves - along with evidence that Aquaman may have survived - the League commits to a course of action that will change the face of the team and the lives of its members forever.

After a fight with the Ocean Master and Black Manta for the control of Atlantis, the JLA, with the help of some mages, travels back in time to rescue Atlantis and Aquaman.