Create Atmosphere

This difficult, unreliable spell creates not merely air but a magically self-renewing atmosphere that survives for approximately 1 year. It will last until exhausted or until [Tooltip Not Found] spell is cast, dispel magic has no effect.

The atmosphere can be cast on any size object and will remain with it regardless of the object's gravity. 

One hit point is permanently drained from the caster (a Wish can restore it) every time this spell is cast. 

To cast it you target a point within range and once casting is complete you create an atmosphere in a sphere with a radius of 500 feet.