The user can harden their own body, making them all but invulnerable to blunt force.
- Eijiro Kirishima (Boku no Hero Academia)
- Tetsutetsu Tetsutetsu (Boku no Hero Academia)
- Martian Manhunter (DC Comics)
- Malchemical (Dynamite Entertainment Comics)
- Tony Woodward/Girder (The Flash)
- William Baker/Sandman (Marvel Comics)
- Users of Six Powers/Rokushiki (One Piece); via Tekkai/Iron Body
- Gabimaru (Hell’s Paradise: Jigokuraku)
- Mister Shifter (Sonic the Comic)
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