You alter reality slightly, so that an attack your foe assumed it had made didn't actually happen.

Daily   ✦     Arcane
Immediate Interrupt      Personal

Trigger: You are hit by an attack against your Will.

Effect: The attack has no effect on you.

Update (1/25/2012)
Updated in Class Compendium.

Published in Player's Handbook, page(s) 171, Dragon Magazine 401.