You can channel energy to give yourself a small amount of protection from weapons.
Prerequisites: Con 13, Wis 13, Earth Sense, Earth’s Warding, ability to rebuke earth creatures.
Benefit: As a standard action, you can spend one of your rebuke earth creatures attempts to give yourself damage reduction 2/adamantine. This benefit lasts for a number of rounds equal to your character level. You must be touching the ground to use this feat.
Source: Races of Stone, page 137.