Clayface

Clayface is an antagonist in Batman, but there are many incarnations of Clayface to be found in the Ultima Series.
 * Clayface I - Basil Karlo, affiliated with the Organization
 * Clayface II - Matt Hagen, Organization
 * Clayface III - Ethan Bennett, member of the Justice League, formerly controlled by the Organization through a Xehanort Shard.