Old Armor Class is no longer used to determine hit chance. Instead:
- **1 AC = 1% damage reduction** (rounded down).
- AC is split into:
    - **Physical AC**: Protects against conventional physical force and weapon damage.
        - Blunt: Reduces damage from crushing force and impacts.
        - Slash: Reduces damage from cutting, tearing, and wide-edged attacks.
        - Pierce: Reduces damage from focused penetration and thrusting attacks.
    - **Elemental AC**
        - Fire: Reduces damage from heat, combustion, plasma, and burning effects.
        - Ice: Reduces damage from frost, freezing temperatures, and cryogenic effects.
        - Lightning: Reduces damage from electricity and electromagnetic discharge.
        - Force: Reduces damage from compressed air, kinetic pressure and invisible impact.
        - Necrotic: Reduces damage from decay, entropy, soul erosion and corruption.
        - Gas: Reduces damage caused by toxic fumes, corrosive chemicals and acids.
        - Holy: Reduces damage caused by radiant, purifying, or divine energies.
        - Blood: Reduces damage caused by manipulation of blood and flesh.

Example:  
If a target has **20 Slash AC**, incoming slash damage is reduced by **20%**.

Damage is reduced **after** all other modifiers (crits, posture effects, etc.).

## Related notes
- [[Combat/Combat|Combat]]