Needs review
Source: Masters of the Wild

Description: Your extraordinary resilience to damage increases.

Prerequisites: Damage Reduction from a class feature or innate ability

Your damage reduction increases by +1/–. If it would normally rise thereafter with level, it does so at its previous rate. For example, a 15th-level barbarian has damage reduction 2/–. By taking this feat, he raises it to 3/–. Thereafter, it continues to rise by +1/– at the designated intervals: to 4/– at 17th level, and to 5/– at 20th level. You may not take this feat more than once.