Paul Duval (Earth-1955)

"At long last, immortality is mine."

- - Grey Gargoyle

Paul Pierre Duval worked as a French chemist, but during an experiment, he was hit by a chemical of unknown substance, which turned his skin into stone, and he realized he could use his newfound powers for crime, becoming the dangerous Grey Gargoyle, being able to kill anyone he touches by turning them into stone.