Mechano-Ray

The Mechano-Ray is a device created by Skeletor. It changes any organic creature into a living machine.

Golden Books Hardcover
In the book "I Have the Power", Skeletor uses the Mechano-Ray to transform a giant spider captured by Beast Man into the living machine Spydor. He would later attempt to use it to enslave "The Human Tornado," creating Sy-Klone. Unfortunately for Skeletor, the Mechano-Ray does not remove free will from sapient beings transformed by it, so Sy-Klone refused Skeletor's orders and assisted He-Man in defeating Spydor.