Maneuver Mastery

The magus has mastered one combat maneuver. He selects one maneuver when selecting this arcana. Whenever he is attempting the selected maneuver, he uses his magus level in place of his base attack bonus (in addition to any base attack bonus gained from other classes). A magus can select this magus arcana more than once. Its effects do not stack. Each time he selects this arcana, he selects another combat maneuver.