The power to have abnormally strong and durable bones. Lesser version of Unbreakable Bones.

Also Called

  • Bone Structure Durability
  • Enhanced Bones
  • Hard Bones
  • Strong Bones


The user's bones are incredibly durable and strong, enabling for powerful attacks to no ill effect.






  • User's bones may only be able to endure a certain amount of impact.
  • Enhanced strength and durability may be limited to the bones.
  • User may have small organs due to the bones being so thick.
  • User may be unusually heavy with these thick bones.
  • Bones can still possibly be broken.

Known Users

  • Osteo-Regenerator Alphas (Alphas)
    • Caretaker (Alphas)
  • Various Characters (Baki the Grappler)
  • Slade Wilson/Deathstroke (DC Comics)
  • Exoskeleton (Embalming -The Another Tale of Frankenstein)
  • Members of the Yato tribe (Gintama)
    • Housen
    • Umibouzu
    • Kamui
  • Yoroizuka Saw Paing (Kengan Ashura)
  • Marrow (Marvel Comics)
  • Kaguya Clan (Naruto)
  • Bone (One-Punch Man)
  • Bone Man (The Death Mage Who Doesn't Want a Fourth Time)
  • Knochen (The Death Mage Who Doesn't Want a Fourth Time)
  • Practitioners of the Hercules Method (The Strange Talent of Luther Strode)
    • Cain
    • The Librarian
    • The Binder
    • Jack the Ripper
    • Luther Strode


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