A spinning cloud of flaming ash surrounds your enemies, burning them and blinding their allies.

Daily   ✦     Arcane, Evocation, Fire, Implement, Zone
Standard Action      Area burst 2 within 20 squares

Target: Each creature in the burst

Attack: Intelligence vs. Reflex

Hit: 5d6 + Intelligence modifier fire damage, and ongoing 10 fire damage (save ends).

Miss: Half damage, and ongoing 5 fire damage (save ends).

Effect: The burst creates a zone of flaming ash that lasts until the end of your next turn. You can use the Cinder Storm Attack power, using a square within the zone as the origin square.

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

A spinning cloud of flaming ash surrounds your enemies, burning them and blinding their allies.

Daily ✦     Arcane, Evocation, Fire, Implement, Zone
Opportunity Action      Close burst 5

Requirement: The Cinder Storm power must be active to use this power.

Trigger: A creature fails its saving throw against this power's ongoing damage

Target: The triggering creature in the burst

Attack: Intelligence vs. Reflex

Hit: 1d8 + Intelligence modifier fire damage, and the secondary target is blinded until the end of its next turn.

Published in Arcane Power, page(s) 113.