Neutralise Gas
(Alteration)(Elemental (Air), Protection)
Reversible

Range:  60 yards
Components:  V, S, M
Duration:  1 round per level
Casting Time:  6
Area of Effect:  1-foot per level radius sphere or one creature
Saving Throw:  Special

This spell will detoxify any poisonous gas. Any such gas within the area of effect will be turned into a fine watery mist and be completely harmless. Even green dragon breath will be rendered harmless by this spell.
If the spell is cast upon an object or creature, the sphere will move with the target. A target creature would get a saving throw versus spell to avoid this effect if it is unwilling. If the target saves, the globe will centre in the nearby area. Use the thrown missiles table in the Player's Handbook to determine where the spell actually centres. This may mean that the target is still in the area of effect until it moves.
The reverse of this spell, poison gas, will create a cloud of poisonous gas which will slay outright any creatures in the area of effect that are under 2+1 HD. All other creatures must make a saving throw versus poison at -2 every round that they stay in the cloud or die in 1d3 rounds. If the creatures make their saving throw for that round, the only take 3d6 points of damage instead. If the target creature had the spell cast upon itself, and then had cast a slow poison, it only takes 1 point of damage per round.
Regardless of what version of the spell is cast, the priest's holy symbol and a sprig of belladonna are required to cast the spell. The belladonna disappears after the spell is cast.

