During the Blackest Night event, Hal allies himself with six other Lantern Corps during The War of Light. He finds himself facing many of his deceased allies, enemies, and people he failed to save reanimated as undead Black Lanterns under the control of the Green Lantern Corps' ancient enemy Nekron. Hal finds himself not only teaming up with Barry Allen (otherwise known as The Flash), who is also resurrected from his death, but also must work with his enemies Sinestro, Atrocitus, Larfleeze, and his former lover Carol Ferris.