Mystic Storm (4e Power)

Mystic Storm	Warmage Attack 15
A torrent of arcane energy surrounds one of your Mystic Orbs until it breaks apart, releasing a powerful explosion of pure energy.
Daily  Arcane, Force, Implement, Zone
Standard Action	Area burst 5 within 15 squares
Target: Each creature in burst
Attack: Intelligence Vs. Fortitude
Hit: 3d8+Intelligence modifier force damage, and the target is pushed a number of squares equal to twice your Wisdom modifier.
Effect: The burst creates a zone of arcane turbulence that lasts until the end of your next turn. A creature that enters the zone or starts its turn there takes 1d8 + Intelligence modifier force damage. As a move action, you can move the zone up to a number of squares equal to your Wisdom modifier.
Sustain Minor: The zone persists.
Special: The Mystic Orb used for this power is destroyed.