The ability to make substances less susceptible to warping, bending or breaking. Opposite to Fortitude Weakening.
User can render anything and everything durable and less prone to destruction, from making something as impervious as diamond stronger than ever, or make something as flexible as putty harder and less likely to bend.
- Atomic Strengthening
- Defense Augmentation
- Enhanced Durability.
- Layer Reinforcement
- Molecular Strengthening
- Skin Hardening
- Busoshoku Haki Users (One Piece)