Sandman

Bio
 * Real Name: William Baker alias Flint Marko
 * Affiliation: Former member of the Sinister Twelve, the Sinister Six, the Frightful Four, the Outlaws, Intruders and the Wild Pack.
 * Base Of Operations: Mobile
 * Height: 6' 1" (Variable)
 * Weight: 450 lbs (205 kg) (Variable)
 * Eyes: Brown
 * Hair: Brown

Marko embarked on a one-man crime spree. Eventually, he was captured and imprisoned in the maximum-security ward at Ryker's Island. Cutting short his stay, he escaped through an unguarded drainpipe, the knowledge of which he had purchased while in confinement. Marko headed south to start a new life; he was pursued by the FBI, as well as state and local police. Narrowly evading the law on numerous occasions, he made his way down the East Coast.

Marko sought refuge at a nuclear test site near Savannah, Georgia. He was lying on a nearby beach when an experimental reactor's steam system exploded, bombarding him with a massive dose of radiation. After a short period of unconsciousness, Marko awoke to find that he could transform his body into an animated, sand-like substance.