_Barkskin_ toughens a creature's skin. The effect grants a +2 enhancement bonus to the creature's existing natural armor bonus. This enhancement bonus increases by 1 for every three caster levels above 3rd, to a maximum of +5 at 12th level. The enhancement bonus provided by _barkskin_ stacks with the target's natural armor bonus, but not with other enhancement bonuses to natural armor. A creature without natural armor has an effective natural armor bonus of +0. #### Mythic Barkskin **Source** [_Mythic Adventures pg. 85_](http://paizo.com/products/btpy8ywe?Pathfinder-Roleplaying-Game-Mythic-Adventures) The target also gains DR/magic equal to the double the enhancement bonus the spell provides to the target’s natural armor bonus. **Augmented (6th)**: If you expend two uses of mythic power, the spell grants DR/epic rather than DR/magic.