The ability to make any layer/surface much harder without losing any mobility. Opposite to Fortitude Weakening.

Also Called

  • Hardening


User can make any layer/surface much harder without losing any mobility through whatever means, either as a whole or only partially.


  • Corporealization: Make immaterial aspects that are normally substanceless more than solid.
  • Deflection: refining defensive properties to rebound or reflect for various purposes. 
  • Dermal Armor
  • Internal Reinforcement
  • Skin Hardening
  • Solidification
  • Continually harden an object without increasing its mass.
  • You can reinforce your blunt force weapons.
  • You can harden air to walk on or create a barrier.
  • Increase the damage of a strike without losing any momentum.
  • Alter the Sharpness of certain objects (i.e. cardboard or paper) by hardening/compacting molecular lattices.




  • Hardened objects allow light and other particles to pass through (can be good or bad).
  • May be limited to certain objects or materials.
  • May require constant contact with the object or the effects disappears.

Known Users

  • Akatsuki Ousawa (Aesthetica of a Rogue Hero)
  • Poison Ivy (Batman: Arkham Knight)
  • Irene Belserion (Fairy Tail); via Enchantment
  • Shirou Emiya (Fate/stay night)
  • Medea (Fate/stay Night)
  • Isaiah Mustafa (Old Spice Commercial)
  • Lightning Flame Users (Katekyo Hitman Reborn!)
  • Gamma (Katekyo Hitman Reborn!)
  • Lambo (Katekyo Hitman Reborn!)
  • Behemoth (Knights & Magic)
  • Busoshoku Haki Users (One Piece)
  • Users of Tekkai (One Piece)
    • CP9 members
    • High Ranked Navy Officers
  • Greed (Full Metal Alchemist)
  • Yomiko Readman (Read or Die); limited to paper
  • Akio Fudo (Trinity Seven)
  • Parasite Unit/Skulls (Metal Gear Solid V: The Phantom Pain)

Known Objects

  • X-Ionizer (DC Comics)
  • Maw Installation (Star Wars)