Firestorm

Required	Fire Sphere 5
Range	Rank x 10 yards
Area	15 yard radius
Duration	Full Round Concentration + 1 round (Maximum Rank x 2 rounds)
Casting	Verbal, Somatic
Cast Action	Full Round
Mana Cost	4 Mana
Effect	The caster summons a swirling vortex of fire in the targeted area which provides Partial Cover (-2) and deals Intelligence + Magecraft + Sphere fire damage every round to everything in the area. To maintain the spell the caster must spend their Full Round action concentrating on the spell. If they move, or cast another spell, Firestorm will persist for 1 additional round before ending. Natural cloth and papers are incinerated, wood bursts into flame, unprotected stone and metal begin to slag, and water boils rapidly.