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Aegis of Lost Souls
Swordmage Utility 16

As one of your foes falls, you send out a pulse of magic that incites other enemies to attack you.

Area burst 2 centered on the triggering enemy

Trigger: An enemy within 10 squares of you drops to 0 hit points

Target: Each enemy in burst

Effect: The target is marked by your Swordmage Aegis power. marking the target does not remove the mark on another target already affected by your Swordmage Aegis. Using this power does not provoke opportunity attacks.

Aegis of Lost Souls is an encounter power available to swordmages at the 16th level.[AP:59]