You are skilled at casting spells and not losing the benefits of your buckler.

Prerequisite(s): Shield Proficiency, Shield Focus, ability to cast spells

Benefit: While wearing a buckler, when you cast a spell with somatic components using your shield arm, you do not lose the buckler's AC bonus.

Normal: Normally when you cast a spell with somatic components using your shield arm while wearing a buckler, you lose the buckler's AC bonus until your next turn.