Shiwan Khan is a would-be world conquer and arch-nemesis of the Shadow. He is the last living descendant of Genghis Khan.
As a youth, he traveled to Lhasa, Tibet and studied with the monks. After learning their mystic ways, he used his knowledge to help the people of Mongolia, but he began to feel a lust for power and set out to rule the world as a new Khan.
He operates from the lost underground city of Xanadu, beneath the Sinkiang. He has access to the treasures of Kublai Khan and was trained by the Tibetan monks to use telepathic powers. He can also appear invisible to most people by staying completely still and suspending his "action of thought."
Shiwan Khan was created by Walter B. Gibson and first appeared in Shadow Magazine #182 (1939).