You throw up a temporary shield to absorb some of the power of a foe's attack.

Encounter   ✦     Arcane
Immediate Interrupt      Close burst 10

Trigger: An attack hits you or an ally within 10 squares of you

Target: The creature hit by the triggering attack

Effect: You reduce the damage the target takes from the triggering attack by 5 + your Constitution modifier.

  Aegis of Shielding: The next successful attack you make before the end of your next turn deals extra damage equal to your Constitution modifier.

Published in Arcane Power, page(s) 53.