As a result of exposure to Jackson Arvad and James Melvin's "magno-chamber", Will-O'-The-Wisp has the ability to control the electromagnetic particles that make up his body. This enables him to vary the density of his body to make part, or all, of his body intangible or rock hard similar to the synthezoid Vision. He also has superhuman strength at higher densities, and has superhuman speed and durability. Also, he has the ability of flight, and at subsonic speeds, Will-O'-The-Wisp appears to be nothing more than a glowing sphere. Will-O'-The-Wisp can also mesmerize people for a short period of time. Will-O'-The-Wisp can will the molecules of his body to oscillate at a small distance from his body, making him look like an ethereal glowing sphere.