Clayface (Freyr)

Tanner Freyr is a Clayface from the Arrowverse's Earth-Prime continuity, separate from the mainline DC versions. A Gotham high-school student shoved into mud laced with a sample of Basil Karlo's Clayface substance, he gained shape-shifting powers and used them to take revenge on the bullies who had tormented him, until Batwoman defeated him and had him locked in Arkham. He was later broken out for a further scheme against Batwoman.