Used to transmuted a volume of gas into another type of gas. Only simple (elemental) gases may be transmuted (eg. oxygen or hydrogen) and the end product must be an inert gas (namely, one of argon, neon, krypton, or xenon), but these constraints improve with proficiency. The volume affected may not exceed CSIx100 cubic feet with MS or CSIx300 cubic feet with CS. Unless cast in an airtight volume of space, the effect will dissipate within several minutes (GM discretion).
Note: Perfect use of this spell would require modern Terran knowledge of physics/chemistry. Consequently, while the GM should know what type of transmutation is occurring ,the Caster must be less specific. He could say, for example, "I wish to turn the air that nourishes into the air that makes us speak with higher voices..." but should not say "convert oxygen to helium".
CML 70+: The individual components of gaseous substances may be isolated
CML 80+: The transmutation may be to any non-inert gas which remains gaseous and stable at the temparature and pressure in the area in which the spell has been cast.
Time: 35-CSI seconds
Range: CSI x2 Hexes
Duration: Permanent