Marshal Mortis was named by witnesses shortly after his first appearance.. he was a shadowy form that grew more active and more powerful as the first 13 U.S. Marshals dies off after thier appointement by the Judiciary act of 1789 (I think the year is right.. dont have my account handy atm)
Doc Pyramid encountered the archaic device that transformed him from a mortal to an embodiment of the desert : Searing heat (firey aura) freezing cold (ice melee) desert winds (riding them with superjump) and Everpresent sands (earth mastery APP) while he was exploring an obscure Egyptian pyramid.
Come to Justice server and say hey! I have the good backgrounds written there.