Three spectral blades appear around you, floating in a ring that wards away your foes.

Daily   ✦     Arcane, Force
Minor Action      Personal

Effect: Until the end of the encounter or until you become unconscious, each enemy adjacent to you that makes an attack roll takes force damage equal to your Intelligence modifier. No enemy can take this damage more than once per turn.

Published in Arcane Power, page(s) 103.