Silverlight Strike
Swordmage Attack 13
Your strike causes silver light to flare around your foe, obscuring its ability to perceive anyone but you.
Melee weapon
Target: One creature
Attack: Intelligence vs. AC
Hit: 1[W] + Intelligence modifier radiant damage. Until the end of your next turn, all your allies are invisible to the target.
Aegis of Shielding: The attack deals extra damage equal to your Constitution modifier.
Silverlight Strike is an encounter power available to swordmages at the 13th level.[AP:58]