Drawmij's Protection from Gas (Abjuration)

Level: 4
Range: 0
Duration: 5 rounds/level
Components: V, S, M
Casting Time: 2 segments
Saving Throw: None
Area of Effect: 20' radius sphere about the caster

This spell creates a volume of
space 20 feet in radius about the caster, within which all
creatures are protected from the effects of all non-magical
gases, fumes, and smoke. All natural gases that touch the
edge of the sphere of protection are dispersed. The air within
the sphere always remains clean, fresh, and replenished
with oxygen, so those within the sphere will not suffer from
lack of oxygen if the air outside is contaminated or its oxygen
consumed by fire. The spell will not work underwater
or in a vacuum. The sphere moves with the caster. It is dispelled
if touched by magical gases or if the caster moves
using magical means.

MC: A fan
and a small vial containing perfume worth at least 100 g.p.
Both vanish after the spell is cast.