
The Guardians stripped him of his ring and banished him to Qward, but the Weaponers of Qward gave him a Yellow Power ring and allowed him to return to his universe, where he became the archenemy of the Corps and Hal Jordan, who many now believed to be the greatest Lantern in the History of the Corps. When the Guardians assigned him to train Hal Jordan, he discovered that Sinestro used his power ring to bring peace to Korugar by installing himself as a dictator. In the DC comics, Sinestro was once the Green Lantern of Sector 1417, often regarded as the greatest Lantern in the history of the Corps. With his ring, he can fly, travel through space, project energy, use a force field, and generate yellow energy constructs. Sinestro has the same powers and abilities as members of the Green Lantern Corps thanks to his yellow power ring. In the aftermath, Sinestro and the other surviving members of the Society were given a five-minute head-start to run in "consideration" of their help defending the Earth. Putting aside his feud with Green Lantern and the Justice League, Sinestro helped fight back Darkseid's forces, taking on Parademons in Tokyo.

Surviving the battle between both sides, Sinestro saved the lives of his allies by shielding them when a newly resurrected Darkseid destroyed the Society's ship. When the Society split between loyalty to Grodd, the original leader, and Luthor, his usurper, Sinestro sided with Luthor. Sinestro later joined the Legion of Doom, notably taking part in a train robbery with Doctor Polaris, Tala, and Lex Luthor. A weakened Stewart was nearly imprisoned as a result and was only able to defeat Sinestro and clear his name with Static's assistance. Īfter that, Sinestro attempted his most ambitious revenge scheme, when he impersonated John Stewart to discredit him as a criminal.

Later recruited into Grodd's Secret Society in a plot to destroy the Justice League, Sinestro was defeated once more. Sinestro dispatched Abin Sur, but was defeated by his successor, Kyle Rayner and Superman. Swearing a blood oath of revenge and vowing to destroy the Green Lantern Corps, Sinestro began hunting Green Lanterns and collecting their rings.

At some point, Sinestro obtained his own, yellow power ring that was as every bit as formidable as a Green Lantern's power ring, making him more dangerous than ever and a deadly threat to every Green Lantern in the universe. Deemed unfit to wield the power of a Green Lantern by the Guardians of the Universe, Sinestro was brought down by his fellow Green Lanterns, including John Stewart, and stripped of his power ring.
