Sandman

William Baker, later known as Flint Marko, was born into poverty with a father who abandoned him and an alcoholic mother. As a child he escaped to the beach, building sandcastles and developing a need to create something lasting. Bullied early on, he fought back, found joy in violence, and gradually became a bully himself. He befriended Vic, adopted the name “Flint,” rose to lead a small gang, became a high school football star, threw or sabotaged a game, and was expelled. His criminal path escalated, he disappointed his mother with stolen gifts, and he was eventually imprisoned—where by coincidence he met his estranged father without revealing their relation.

Flint escaped prison and, during various versions of his flight, entered a restricted site contaminated with experimental radiation. His body fused with the sand beneath him, giving him the ability to convert to sand, manipulate his mass, density, shape, and structure, and reassemble from near-total destruction. He adopted the name Sandman and immediately entered conflict with Spider-Man, suffering early defeats via vacuum cleaners, sprinklers, and other environmental weaknesses.

He repeatedly escaped custody, fought Spider-Man, battled the Human Torch, and was scattered across the city by a wind turbine. He joined the first Sinister Six under Doctor Octopus, fought Spider-Man in sequential duels, and was eventually imprisoned again. He clashed with the Fantastic Four, the Defenders, the Avengers, and various solo heroes, and temporarily became the “dirty Sandman” when chemical exposure caused him to attract refuse and lose stability until Spider-Man cured him. He later built chemically enhanced armor that increased his powers, fought alongside Blastaar, and temporarily became brittle glass after a Hulk battle.

Sandman joined multiple incarnations of the Frightful Four, participated in battles involving Medusa, the Wizard, Trapster, and others, and was repeatedly defeated and re-imprisoned. He was fused into glass again during Hulk encounters, cured multiple times, and oscillated between escape and recapture. For a period he merged with Hydro-Man into the nearly-mindless Mud-Thing, was shown off as a sideshow creature, and eventually separated after experimental radiation.

Shaken by his experiences, Flint attempted reform. He befriended the Thing, helped Spider-Man against local criminals, took the civilian alias Sylvester Mann, worked a job in Brooklyn, protected his landlord’s family, and joined Silver Sable’s mercenary organization, the Wild Pack, becoming a consistent and valued operative. He aided in international missions across Europe, the Middle East, and Africa, cooperated with the Avengers, and was briefly made a reserve Avenger. He experienced further crises during the Infinity War and Infinity Crusade but continued serving Sable’s team, the Intruders, in operations against Hydra, the Genesis Coalition, and global criminal networks.

His reform faltered after Wizard attacked him with a rebuilt ID machine, destabilizing his personality. Flint drifted back toward crime, rejoined various villain teams, and clashed with the Fantastic Four, Spider-Man, the Thunderbolts, and others. Multiple battles resulted in him turning to glass again, losing molecular cohesion, and struggling with his body’s instability. During this period he embraced the identity “Flint Marko” once more. His sand body occasionally disintegrated, reformed, or split into autonomous fragments with their own personalities.

Sandman’s relationship with Alma Alvarado and her daughter Keemia deepened his instability. Keemia saw him as her father, and when his fractured personalities murdered Alma and others, his psyche splintered further. He abducted Keemia to Governors Island and fought Spider-Man with an army of sand duplicates until Spider-Man scattered him with ventilation turbines. After reforming, he attempted to steal a diamond for Keemia and was dispersed again during a clash with Spider-Man and Moon Knight.

He was later recruited for Doctor Octopus’s reformed Sinister Six, helping Octavius acquire equipment for global extortion. He battled the Future Foundation, the Avengers, and Spider-Man in various operations tied to Ock’s climate weapon. Spider-Man ultimately captured Sandman’s primary consciousness grain and used it to extract information. After Octavius’s defeat, Sandman’s head was kept contained by the Future Foundation.

During the era of the Superior Spider-Man, Otto (inside Peter’s body) enslaved Sandman and other villains via Spider-Bot mind control, forcing them to act as the “Superior Six.” Sandman eventually broke free, attacked Spider-Man for crossing moral lines, and was blasted apart by Sun Girl.

Flint later aided the Thing during a prison arc, broke out with him, and joined a temporary Frightful Four to help repel the Quiet Man’s Counter-Earth invasion. During World War Hate, influenced by global psychic shifts, Sandman briefly returned to heroics, stopping a prison break.

His body began losing cohesion permanently, and he feared dying. Spider-Man attempted to comfort him on the beach of his childhood as his form dissolved—but Flint survived, now unable to hold a human shape. His future self, an immortal Sandman from billions of years ahead, seized control of his body through a dimensional rift. Flint fought back with Spider-Man’s help, ultimately allowing Spider-Man to temporarily control his sand form. Together they sealed the rift and expelled the future Sandman.

In Sinister War, Sandman regained human shape and rejoined Doctor Octopus’s newest Sinister Six in exchange for research into restoring his mortality. He participated in battles against Mysterio, the Savage Six, and other villain factions before being freed from Kindred’s control.

Appearance: Sandman has light tan skin in the fully human parts of his body, though most of his form is shown merged seamlessly with dense, grainy sand. His head and upper torso maintain a mostly human structure: a broad, heavyset build with thick limbs, a wide neck, and compact, powerful proportions. His hair is short and dark brown with a rigid, combed-back shape. He wears a tight, long-sleeved shirt with horizontal dark green and black stripes that cling to his thick frame, the fabric stretched but intact across his large chest, shoulders, and arms. His forearms and hands shift directly into coarse, compacted sand, with every grain visible across the massive, reshaped limbs. In larger transformations, his entire lower body becomes a column of swirling, densely packed sand, with coarse ridges, ripples, and clumps forming natural contours. His shoulders expand into hulking masses of hardened grit, and his arms grow into towering limbs composed entirely of sand, their surfaces uneven, cracked, and layered with granular detail. In giant form, his body resembles a living sandstorm given structure: enormous hands with blunt, blocky knuckles, arms that shift between humanoid and amorphous, and a torso that blends clothing, flesh, and sand into one towering shape.

Personality: Sandman carries a rough, street-hardened mindset shaped by poverty, bullying, and a lifetime of pushing back against anyone who tried to control him. He’s stubborn, blunt, and quick to anger, with a survival instinct that never fully shuts off. Beneath that, however, he has a strong protective streak and a buried desire to be better than the man he used to be. He forms attachments quietly and fiercely, especially to children or people who remind him of the stability he never had. His sense of loyalty is complicated: he doesn’t trust institutions, but he responds to respect, honesty, and anyone who treats him like a person instead of a monster or a tool.

He’s capable of remorse and reflection, but his emotions run deep and unpredictable; guilt, nostalgia, and resentment constantly pull him in different directions. When he feels cornered or betrayed, he defaults to aggression, yet when he feels genuinely seen, he becomes steadier and even gentle. He wants purpose and belonging but is terrified he’ll ruin whatever good he touches.

Sandman’s entire body is composed of living, shapable sand. He can form himself into a human-like shape or shift any part of his body into loose grains at will. His consciousness remains active even when scattered, and he can reform himself as long as the core grain that carries his mind remains intact. He can grant another person control over his sand form, and because his original body is gone, he no longer ages, needs food, air, or rest. His immortality is tied to the sand itself rather than to any physical human biology.

He retains full command over every particle, allowing him to alter cohesion, shift density, and manipulate his form with precision. He can harden himself to the toughness of sandstone or disperse into loose grains to avoid damage. He can reshape his body into weapons, stretch or flatten his form, slip through tight openings, create sand blasts, or imitate another person’s silhouette. His strength increases with mass, allowing him to reach enormous lifting power when enlarged. He can generate glass-like structures by altering his particles, reflect energy, and convert nearby sand into part of his body to replenish mass. He can create independent sand clones of himself, merge with them into a towering giant, and use his granulated form to climb walls.

Although not formally educated, he possesses a decent grasp of practical science and can apply it improvisationally. He has street-learned combat instincts, and he can mimic voices through lip-syncing while copying someone’s physical appearance.

Despite his versatility, water remains his most debilitating weakness; wet sand becomes uncontrollable until it dries. Extreme heat can fuse his particles into fragile glass. His consciousness resides in a single “soul grain” within his body, and separating that grain from the rest leaves him unable to reform or direct his mass.