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Thunderclap Strike
Swordmage Attack 7

Raising your blade, you send out a clap of thunder that sends your foes sprawling as noise cascades over them.

Target: Each creature in burst

Attack: Intelligence vs. Fortitude

Hit: 2d6 + Intelligence modifier thunder damage, and you knock the target prone.

Thunderclap Strike is an encounter power available to swordmages at 7th level.[AP:56]