SINESTRO

Thaal Sinestro of planet Korugar is the arch-nemesis of Hal Jordan and the Green Lantern Corps, created by John Broome and Gil Kane. Once honored as the universe's greatest Green Lantern, he was stripped of his ring and banished after establishing a totalitarian dictatorship on his homeworld, subsequently forging a yellow power ring and founding the terror-wielding Sinestro Corps.