For the phoenix clan's PrC in Way of the Samuraii there is an ability called shiba's armor which states that the effects of shiba's technique are tripled for purposes of adding Natural armor bonuses to your AC. Has this been errated? Shiba's technique allows a character to boost or lower the level of the caster casting the spell. As far as I can tell - it would only relate to natural AC when a shugenja cast barkskin. There is another feat called Hida's technique and an ability in a Crab PrC called Hida's armor which does the same thing. This feat does give Natural AC. Was this ability a mistake?