Your allies have the split second warning necessary to duck beneath the enormous, flaming scythe summoned by your magic.

Daily   ✦     Arcane, Evocation, Fire, Implement
Standard Action      Area burst 2 within 10 squares

Effect: Each ally in the area can fall prone as a free action.

Target: Each nonprone creature in the burst

Attack: Intelligence vs. Reflex

Hit: 3d8 + Intelligence modifier fire damage.

Miss: Half damage.

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

Published in Dragon Magazine 383, page(s) 53.