Black dust whirls up around your foes, sapping their strength and clouding their vision.

Daily   ✦     Arcane, Implement, Necromancy, Necrotic, Zone
Standard Action      Area burst 2 within 20 squares

Target: Each creature in the burst

Attack: Intelligence vs. Fortitude

Hit: 5d6 + Intelligence modifier necrotic damage, and the target is weakened (save ends).

Miss: Half damage.

Effect: The burst creates a zone of clinging black dust that blocks line of sight for all creatures damaged by this power until the end of your next turn.

Sustain Minor: The zone persists.

Update (10/18/2011)
Updated in Wizard Schools article.

Published in Arcane Power, page(s) 115.