You conjure a floating mystical shield to defend you.
Prerequisite(s): Ability to cast 3rd-level spells.
While you have an enhancing spell of 3rd level or higher in your known spells and have at least 3 MP in your MP pool, you can conjure a floating force shield to protect you as a standard action. The force shield provides a shield bonus to AC equal to the highest-level enhancing spell you can cast and lasts a number of rounds equal to the highest-level enhancing spell you can cast. You cannot shield bash or enhance the shield, but it cannot take damage except by ruin spells. This feat acts like the Shield spell against ruin spells. As a secondary benefit, you gain a +1 competence bonus to your caster level when casting enhancing spells.