"When he pledges his soul to a princess, a knight becomes a supreme being."
― Shin Hanabusa (Lance N' Masques)

The power to become exactly as strong as one needs to be at any given moment. Variation of Conditional Power and Reactive Adaptation.

Also Called

  • Selective Strength
  • Strength Adjustment


The user automatically becomes exactly as strong as they need to be to accomplish what they're trying to do at a given moment.




  • Boosts are only temporary.

Known Users

See also: Strong as They Need to Be.

  • Acqua of the Back (A Certain Magical Index); via Divine Mothers Mercy
  • Hyperadrenal Alphas (Alphas)
  • Yuujiro Hanma (Baki the Grappler)
  • Kenpachi Zaraki (Bleach)
  • Miyazawa Kenji (Bungou Stray Dogs)
  • Nemesis Kid (DC Comics)
  • OMAC (DC Comics)
  • Shizuo Heiwajima (Durarara)
  • Members of the Yato tribe (Gintama)
    • Abuto
    • Housen
    • Kankou/Umibouzu
    • Kouka
    • Kagura
    • Kamui
  • Ri Shin (Kingdom)
  • Kevin Connor (Marvel Comics)
  • Cain Marko/Juggernaut (Marvel Comics)
  • Venom (Marvel Comics)
  • He-Man (Masters of the Universe)
  • Various Characters (Mythology)
    • Samson (Biblical Mythology)
    • Several Heroes (Norse Mythology)
      • Grettir
      • Hròmundr
      • Arnkel
      • Olaf
  • Saitama (One-Punch Man)
  • Felix (Twilight Saga)
  • David Dunn (Unbreakable)
  • Kazuma Kuwabara (Yu Yu Hakusho)

Known Objects

  • Nemesis Kid's Mystical Potion (DC Comics)
  • Crimson Gem of Cyttorak (Marvel Comics)
  • Eternity Mask (Marvel Comics)
  • Gauntlets of Ares (Marvel Comics)


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