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This technique allows the user to turn their body into jet-black steel. Hiruko states that blades do not affect him at all due to this ability, which is demonstrated when Sai's tantō snapped clean in half on impact.

Trivia

  • The portion converted into jet-black steel is similar in appearance and functionality to Kakuzu's Earth Spear technique, though Hiruko did not show the offensive usage.

See Also

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