Hal Jordan was now the Green Lantern of Earth again. Kyle Rayner was still Ion, containing the power of the Green Lanterns without needing a ring to wield it. Guy Gardner and John Stewart were both Lanterns again and lived on Oa, the homeworld of the Green Lantern Corps training new recruits. Things were good. What they didn’t know is that Sinestro was busy in the Anti-Matter Universe, forcing the Weaponeers to construct a massive Yellow Lantern, which mimics the Central Battery on Oa, where the green power came from. With his own yellow battery, Sinestro created multiple rings sending them out to those beings in the universe that inspired great fear. Once his Sinestro Corps was assembled, they led a brutal assault on Oa, killing many Green Lanterns in the process. The battle was unlike anything the universe has ever seen and raged on to eventually come to Earth. Kyle Rayner was stripped of his Ion powers, but managed to get a ring in time to join the Corps. Sinestro was captured, but not before the Guardians allowed the Lanterns to compromise their values and use their rings to kill.
Sinestro was locked up in Sciencell on Oa but told Jordan that the “Blackest Night” was coming, and in this time of darkness Jordan would be compromised. Jordan was shaken up but worked to distract himself. The Guardians adapted to the new threat of the yellow rings of fear but establishing the Alpha Lanterns, regular Corpsmen transformed into emotionless judges, meant to keep the Corps in check. Meanwhile, other rings created from different aspects of emotion were manifesting in the universe. In Sector 666, the demonic Atrocitus vomited up a bloody red ring of rage. On a distant serene planet, two rebel Guardians made blue rings of hope. On the all-female world of Zamaron, its inhabitants made violet rings of love. And deep in a cavern on Okaara, one lone figure clutched an orange ring of greed. All of these various Corps began to get into conflicts and change the dynamics of the universe. In the Anti-Matter Universe, a jet black lantern manifest black rings of death, and these would change everything.
While the Corps worked to hunt down Sinestro’s soldiers still out there, using their rings to torture innocent beings, Hal Jordan encountered the Blue Lanterns and found his could use his green ring in conjunction with a blue one. He also ended up in Sector 666, where a red ring of rage overtook him for a little while. Sinestro was being transferred when his Corps arrived to liberate him and all hell broke loose. The War of Light began, all the various colors battling each other. As they were distracted, an old villain named Black Hand brought the scourge of the Black Rings to Earth. These rings were keyed only to the dead, and allowed hordes of dead heroes and villains to be resurrected as dark versions of themselves. At the time characters like Aquaman, Martian Manhunter, and Hawkman were all dead and came back as monstrous Black Lanterns.
After a few days of fruitless battle, the Black Lanterns merely reconstructing themselves, its discovered that if two Lanterns of different colors use their powers together they can destroy a Black Lantern. Across the globe the battle rages and its revealed that Nekron, a being who controls death has been making the rings. It’s also discovered that an entity lives in the Earth who generates a White energy that creates a single ring and single Lantern. Sinestro gets ahold of it and fails, with Hal using its power to drive Nekron and the Black Lanterns away. Before the White Lantern vanishes, it resurrects a handful of heroes and villains. Through battle, Hal and Sinestro have reached a tentative alliance. Currently, Hal and girlfriend Carol (now wielding a Violet ring) have discovered that the Red Lantern, Atrocitus is on Earth looking for the source of his rage power. The White Lantern has also reappeared in New Mexico, forming a crater where it landed, and much like the sword in the stone is immovable.