Smoke Screen

Required	Fire Sphere 1
Range	Rank x 10 yards
Area	8 yard radius
Duration	Rank x 5 rounds
Casting	Verbal, Somatic
Cast Action	Standard
Mana Cost	Free
Effect	The caster sends smoke boiling out from their hands or clothing, creating a cloud of smoke across the area of effect. Initially, the smoke limits visibility through/in it to 20 yards, however the smoke's density increases as the caster concentrates, reducing visibility by 2 additional yards each round, to a minimum visibility limit of 4 yards after 8 rounds. The smoke is natural, and may be affected by air currents, and will dissipate rapidly once the duration ends. Any breathing creature within the smoke that doesn't use some sort of breathing filter must pass a resistance roll or take 1 non-lethal damage from smoke inhalation each turn.