Antifire Sphere

Sandstorm (Sa)Supplementals (3.5)
School
Abjuration
Casting Time
1 standard action
Components
V, S
Range
Touch
Target
One creature
Duration
10 minutes/level
Saving Throw
Will negates (harmless)
Spell Resistance
No (see text)

You bring into being a mobile, spherical energy field that protects against fire.
All creatures within the area of the spell gain immunity to fire damage.
In addition, the sphere prevents the entrance of any creature with the fire subtype and hedges out such creatures that are in the area when the spell is cast.
You must overcome a creature’s spell resistance to keep it at bay.