Frost Storm

Unlike most attack spell, which rely of fire in order to hurt the foes, this spell does the exact opposite. Calling upon the powers of the sky, the mage calls forth a rain of sharp ice blades, which on their way to the ground horribly injure all the foes surrounding him or her. Only very strong foes can survive this rain of frosty death.

Not that the storm continues, until dismissed, constantly draining the mana of the mage.