You lance your foe's mind with mental trauma, which makes it vulnerable to psychic damage. If you choose, you can strip away its psychic resistances.

At-Will   ✦     Augmentable, Implement, Psionic, Psychic
Standard Action      Ranged 10

Target: One creature

Attack: Intelligence vs. Will

Hit: 1d8 + Intelligence modifier psychic damage, and the target gains vulnerability to psychic damage equal to your Charisma modifier until the end of your next turn.

Special: You can use this power unaugmented as a ranged basic attack.

Augment 1

Hit: As above, but the vulnerability equals 5. The target loses resistance to psychic damage until the end of your next turn.

Augment 2

Hit: 2d8 + Intelligence modifier psychic damage, and the target gains vulnerability to psychic damage equal to 5 + your Charisma modifier until the end of your next turn.

Published in Player's Handbook 3, page(s) 86.