As Hal Jordan fought Krona, Sinestro was granted a green ring for unknown reasons. 2 introduces us to a heroic Yellow Lantern version of the hero John Stewart, we take a look at some other heroes who donned a yellow ring over the years. Sinestro quickly became the Green Lantern Corps' most powerful nemesis, partially due to a weakness in their power rings that prevented them from directly affecting the color yellow.Sinestro first met Hal when he had already made an alliance with Qward. The Sinestro Corps defeats them and Sinestro executes them all.

However he escaped using a ring that could drain the Green Lantern's ring-power and continued to menace Hal. When the last surviving Guardian, During the period when he was believed to be dead, Sinestro had two indirect encounters with other heroes. With Green Lantern: Earth One Vol.
He later uses Sinestro's ring when Parallax is returned to the Central Power Battery, allowing Krona to control all Green Lanterns Hal and others escaped only thanks to their prior experience with Parallax in order to give himself a weapon against the other Lanterns.

Volthoom attacks and consumes the hopes and fears of the Korugarians.

After doing so, he simply meditates there, awaiting death. He dives into the white energy and emerges as a figure all in white, declaring he is about to show the universe he truly is the "greatest Lantern of them all".

Then upon returning to his home planet of Korugar, they were met with very much opposition and Hal discovered that Sinestro forced his planet to worship him and that he had a very strict and unjust set of rules. When he released Hal from the bubble to eliminate him, he was defeated and imprisoned in a green bubble by Hal, who did not take him back to his universe as it would go against the jurisdiction of the Guardians.
Parallax then bonded to Jordan, who took the entity's name for himself, and promptly finished off the Green Lantern Corps by absorbing the Central Battery's energies into himself. After a short battle, Hal knocked some sense into Sinestro and he realized that he must hide for the Guardians will punish both of them. When dealing with an artificial intelligence based on the dead son of its creator, On another occasion, Kyle Rayner was accidentally sent approximately a decade into the past, where he found himself witnessing a battle between Hal and Sinestro. However, after killing one of the Guardians, When Sinestro and the other 'New Guardians' are trapped in the Book of the Black by Lyssa Drak while trying to recover the entities from Krona, Hal Jordan escapes with their rings. Members of the Corps are immediately taken to Qward to "...be subject… His dedication to preserving order originally manifested in his previous career, an anthropologist specializing in reconstructions of ruins of long-dead civilizations. When he asks how she knows this, she reveals she has carved every word from the Book of Parallax on her body. He then tells her that they must work together to stop the Blackest Night.As the Black Lanterns attack, Sinestro is emotionally manipulated by the corpse of Arin. Afterward, Hal and Sinestro debate whether to contact the In the midst of the battle, Nekron kills a Guardian and uses its blood to summon a large white figure from Earth. Hal Jordan realizes the Entity needs a mind to guide it and prepares to fly in, but Sinestro cuts him off. Sinestro has been shown to have chewed a very large hole in his finger, and he used his blood to paint the insignia of the Sinestro Corps on his cell window.