Skulk

Bruce Banner was a scientist experimenting with radiation. An experiment he was working on went horribly wrong, however, and fused him with the elemental entity known as Solomon Grundy. The fusion between Banner and Solomon Grundy became known only as the Skulk. After a confrontation with Doctor Strangefate, Strangefate showed Skulk that he could keep the Skulk in his human form with the use of magic. The Skulk agreed to work as an agent for Doctor Strangefate in return for Strangefate keeping Skulk in the form of Bruce Banner most of the time.

Doctor Strangefate, fearing that Access (Axel Asher) would divide the Amalgam Universe into its original two universes, decided to capture and exterminate him. He had his servant Myx mystically teleport his three agents into his Sanctum, Arkham Tower: Jade Nova, Skulk, and the White Witch.