A shroud of roiling shadows coalesces around your orb. Your enemies see a globe of utter blackness flare out to engulf them.

Encounter   ✦     Arcane, Illusion, Implement, Necrotic, Zone
Standard Action      Area burst 1 within 20 squares

Target: Each creature in the burst

Attack: Intelligence vs. Will

Hit: 1d6 + Intelligence modifier necrotic damage.

Effect: The burst creates a zone of illusory darkness that lasts until the end of your next turn. All creatures are blinded while they are within the zone.

  Orb of Imposition: You can extend the duration of this effect, even though it is not an at-will power. If you do so, the zone expands to a burst 3 and doesn't affect you or your allies.

Published in Arcane Power, page(s) 108.