As the Black Lanterns attack, Sinestro is emotionally manipulated by the corpse of Arin. At one point, the corpse even alters itself to look more like a living person and addresses Sinestro by his full name (revealing his first name, Thaal, for the very first time). Just then Hal, Abin and Carol burst through the streets to where the others are. With all four in place, they destroy Abin's and Arin's rings. Afterward, Hal and Sinestro debate whether to contact the Blue or Red Lanterns, respectively. Hal then makes the decision himself. Sinestro relents, tells his Corps that there is a temporary truce with the GLC, and travels with the others to Odym. After gathering the other Corps leaders, Sinestro and the others follow the Black Lantern battery to Earth, where Nekron has already risen. Under Indigo-1's direction, they combine their lights, thinking it will destroy the Black Lanterns' source of power, but this fails and in an attempt to bolster their ranks, Ganthet duplicates the Corps leaders' rings, having them seek out candidates to deputize. Sinestro's ring chooses the Scarecrow. The Black Lantern Spectre then attacks the group. In order to defeat it, Hal releases Parallax from its prison, intending to let it possess him again. Sinestro offers to join with Parallax instead, but is rebuffed. When the restored Spectre manages to separate Parallax from Hal, Sinestro again tries to claim the fear entity as his own, but is foiled when Parallax is pulled away by an unknown force.