Sorcerer/10th

Absorb Magic

Starting from 10th level, whenever you successfully cause a spell to fail using counterspell, you regain magic points equal to half those used to cast the failed spell (rounded up).

Shield of Sorcery

At 10th level, you learn to armor yourself with the lingering magic of your spells. While you are concentrating on a sorcerer spell, you add +2 bonus to all saving throws in which you lack proficiency, and your AC increases by 2. This cannot increase your AC above 25 (before adding a shield).