(W) David S. Goyer, Geoff Johns (A) Leonard Kirk (CA) Carlos Pacheco. Written by David S. Goyer and Geoff Johns; ART by Leonard Kirk and Keith Champagne; wraparound cover by Carlos Pacheco and Jes s Meri o In stores July 9. The giant-sized climactic chapter of "Princes of Darkness!" Mordru and Obsidian continue their reign of darkness over the world* threatening to destroy it. But the JSA has allies that will help turn the tide of this war! The final battle between Sentinel and Obsidian - father and son - concludes. Plus* Power Girl makes a shocking discovery* and a member of the JSA makes the ultimate sacrifice! FC* 56 pg