Cool

Area
Lowers the ambient air temperature of an area. This may cause fog to appear if the conditions are right. The spell cannot lower the temperature below about -40°F (-40°C).

Duration: 1 hour.
Time to cast: 1 minute per base cost application.
Base cost: 1/10 (minimum 1). Each base cost application lowers the ambient temperature by 10°F. Same cost to maintain.
Prerequisites: Cold and at least four Air spells.

Item
Staff. Usable only by a mage.
Energy cost to create: 150.