sentences:  Sinestro's rescue attempt is interrupted by a Black Lantern attack, which he only survives through the arrival of Hal Jordan and Indigo-1, leader of the Indigo Tribe.Indigo-1 brings Sinestro to Korugar, so that he may finally confront Mongul.After a fierce battle, Sinestro activates the override systems in Mongul's rings, using them to imprison him inside the Sinestro Corps Central Power Battery, thus overthrowing Mongul,taking control of the Mongul Corps,and renaming it "The Sinestro Corps" after himself.