Abel Gantz

 was an alchemist. He could change his flesh to any element or shape. He acquired this ability after a laboratory accident inadvertently caused when the TARDIS escaped from the Funhouse (COMIC: Funhouse) He met the Sixth Doctor and Frobisher on Xaos. Abel died after transforming into a giant bomb and exploding, destroying the Skeletoid control room. (COMIC: Abel's Story, The Warrior's Story, Frobisher's Story)