Supramor

Supramor, also known as the Hidden Man, is a humanoid alien being who attempted to invade Earth in early 1965. He brought the technology of his scientifically superior race, bright green rays of light, to Earth and used it to sap his target's knowledge for himself. He aimed to use the rays on the world's greatest scientific minds and thereby conquer the world, and along the way enslaved a man named Loko to do his bidding. His plan was foiled by Giant-Man, and soon after a starship from his home planet arrived to return him home for punishment for using their technology to attempt to conquer a primitive planet. They also restored those he had targeted to their former, knowledgeable state.