Resist Pressure

Regular 
Protects the subject from the effects of pressures higher or lower than his native pressure, providing the equivalent of Pressure Support (P, X) or Vacuum Support (P, X). The caster must select that advantage the spell grants and at what level at the time of casting. 
This spell is most appropriate in scientific-paradigm settings; if the space between the planets is filled with ordinary air and the bottom of the ocean is much like the bottom of a river, there’s not much use for this spell. 
Resist Pressure does not enable the subject to breathe in the environments it renders survivable; Breathe Water or Hold Breath may be useful in these situations.

Duration: 1 minute. 
Cost: Varies with the advantage conferred.

Advantage Energy Cost
Pressure Support 1 2 to cast; 1 to maintain
Pressure Support 2 3 to cast; 2 to maintain
Pressure Support 3 5 to cast; 3 to maintain
Vacuum Support 3 to cast; 2 to maintain
Prerequisite: Weather Dome.

Item 
Wand, staff, or jewelry.  
Energy cost to create: 900.