Mongul (Earth-1955)

Mongul was the tyrannical warlord ruler of Sakaaran, who, through the power of his Black Mercies was able to control, intimidate, and kill those who defied him. Hosting gladiator games at the planet's capital, he hoped that such attractions could hide the poverty and state of the planet. After his forces abducted Superman and Hulk, his reign started a downfall following a revolution. Returning years later in an attempt to kill both Earth heroes, he was left catatonic with a Black Mercy infecting his mind by Wonder Woman.