Natural armor bonus

Natural armor represents a creature's hide or magical effects that make skin thicker (such as Barkskin). Natural armor provides a bonus to AC.

Most items and spells provide plain "natural armor" modifier to AC. Only the highest effect applies. However, there are also some stacking bonuses to natural armor with a different bonus type.

Natural armor bonus:
 * Named items
 * Random items with the suffix "of Natural Armor": +1 to +10
 * Random armor/shields with the prefixes Bracing / Bolstering / Buttressing: +1 to +3
 * Pirate Hat from Treasure of Crystal Cove +1 to +5
 * Spells/Potions:
 * Barkskin: +2 to +5
 * Spiderskin: +2 to +5
 * Toughen Construct: +2 to +5
 * Yugoloth potion: +4
 * Hezrou Cookie: +4
 * Crafting:
 * Cannith Crafting: +1 to +3
 * Dragontouched Armor: Sovereign Rune +4.
 * Sapphire of Natural Armor +1 to +8.

Primal bonus:
 * Rough Hide items

Miscellaneous bonuses:
 * Knight's Loyalty PDK set bonus: +3 insight bonus to natural armor
 * Abishai Destroyer: +2 profane bonus to natural armor
 * Some Guild Airships buffs grant stacking bonuses to natural armor