a degree. Guy only wears the yellow ring for a short time before Hal Jordan, possessed by Parallax, destroys it. Parallax In the meantime, the return of the Guardians result in the Corps being re-established. The newly restored Corps is short-lived, thanks to the inadvertent efforts of the alien warlord Mongul and Hank Henshaw, a cyborg who is at the time impersonating Superman. As part of their ultimately thwarted plot to transform Earth into a new version of Mongul's interstellar fortress Warworld and gain revenge on Superman, Mongul and the Cyborg use several nuclear devices to destroy Coast City, California, which is Hal Jordan's home, and everyone living in it. Driven mad with grief by the destruction of his city and the Guardians' apathy towards his plight, Jordan's previously indomitable willpower is shattered. Parallax is thus able to possess him completely and push him towards a homicidal rampage that wipes out most of the Guardians and leaves scores of Green Lanterns dead or maimed, as Parallax seeks to absorb the Central Power Battery's energies into his being. As a last-ditch effort to halt Jordan's rampage, the Guardians free Sinestro from the Central Power Battery and send him to stop Jordan. After a battle, Jordan snaps Sinestro's neck, apparently killing him. It is later revealed that what the Guardians actually extracted from the Battery was a hard-light construct of Sinestro, created by Parallax and mentally puppeteered by the real Sinestro from within the Battery. Parallax then bonds to Jordan, who takes the entity's name for himself, and promptly finishes off the Green Lantern Corps by absorbing the Central Battery's energies into himself. With the Battery destroyed, Sinestro escapes and goes into hiding as he watches Jordan become what he always hated Sinestro for being: a traitor and a murderer reviled by his friends and his allies. When the last surviving Guardian, Ganthet, gives the last remaining power ring to Kyle Rayner, Sinestro becomes obsessed with the young Earthman, realizing that despite Jordan's downfall, his plot to extinguish the Green Lanterns' light failed. Duplicate and time travel During the period when he is believed to be dead, Sinestro has two indirect encounters with other heroes. Wonder Woman faces a duplicate of Sinestro created by an artificial intelligence based on the dead son of its creator. The A.I. created the duplicate Sinestro after watching videos of his old battles, believing that he is