Retributive Shield

Heroic Tier
Prerequisite: Swordmage with aegis of shielding
Benefit: When you use your aegis of shielding power, you gain a +2 bonus to the next attack roll made before the end of your next turn against the foe that triggered the aegis of shielding immediate interrupt.

Published in Forgotten Realms Player's Guide, page(s) 136.