Anticold Sphere

Abjuration [Cold]
Level: Druid 5, sorcerer/wizard 5
Components: V, S
Casting Time: 1 standard action
Range: 10 ft.
Area: 10-ft.-radius emanation
centered on you
Duration: 10 minutes/level (D)
Saving Throw: None
Spell Resistance: Yes
As a rosy color flickers into being in the
surrounding air, you feel a sense of warmth
and well-being.
All creatures within the area of the
spell gain immunity to cold damage.
In addition, the emanation prevents the
entrance of any creature with the cold
subtype. The effect hedges out such
creatures in the area when it is cast.

Note: Forcing an abjuration barrier
against creatures that the spell
keeps at bay collapses the barrier
(PH 172).