Despero

Despero is an alien dictator and enemy of the Justice League

History
Despero was the tyrannical dictator of the planet Kalanor. Two rebels escaped Kalanor and travelled to Earth to build a weapon to fight Despero. He arrived on Earth to stop them and battled the Justice League. Despero was defeated and the planet Kalanor was set free. He eventually returns to Kalanor and enters the mystical Flames of Py'tar, giving him super strength. He attempts to battle the Justice League in their satellite headquarters. Though he was defeated again, he returns once more and kills Gypsy's family. Despero is again defeated by Martian Manhunter. Despero later becomes possessed by a group of aliens who use him to destroy most of Manhatten. Supergirl stops him and has his spirit exorcised from his body. While his spirit was trapped on the Abyssal Plane, he met Johnny Sorrow. The two used advanced technology to return to Earth and battle The Justice League and the Justice Society. Despero was defeated and again sent back to the Abyssal Plane.

Television History
Despero appeared in the Justice League animated series. He was ostricized on his planet for his third eye, making him look strange. He eventually came in contact with the Flames of Py'tar, which he used to conquer his home world Kalanor. He then tried to conquer the universe but was stopped by the Justice League and the Gree Lantern Corps. Martian Manhunter travels to the Flames of Py'tar and uses it to set the planet free.

Despero also appeared in Batman:The Brave and the Bold animated series. In this series, he brainwashes much of the Lantern Corps into being his army. The team of Batman, Guy Gardner, G'Nort, and Sinestro manage to defeat him.