Matt Hagen is a criminal known as Clayface.
Season Eleven[]
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When a mysterious creature began attacking Bruce Wayne's property, Alfred Pennyworth suggested it could be Hagen, however, Bruce said that Clayface would know better then to tear up one of his own.
Appearances[]
- Season Eleven: Effigy (Mentioned only)
In the Comics[]
Matt Hagen first appeared in Detective Comics #298 (December, 1961) and was created by Bill Finger and Sheldon Moldoff. Hagen was immersed in a mysterious protoplasm by accident, turning him into a malleable clay-like form. Hagen became the criminal Clayface, an enemy of Batman.