Thought Shield

Any time you are targeted by a spell or power seeking to charm, frighten or affect the mind, you can fortify your mind against intrusions.

Until the end of your next turn, you gain advantage on all Wisdom, Intelligence and Charisma saving throws and are resistant to psychic damage. 

Augment:

For every level cast this power’s duration increases by 1 round (up to 5).

* - Reaction can be taken any time the caster is targeted by a spell or power seeking to charm, frighten or affect the mind