Create or Destroy Atmosphere

You can create or destroy a breathable atmosphere.

Create Atmosphere. Choose an object within range, a magically self-renewing atmosphere appears and fills 15 cubic miles of space with fresh air. The atmosphere stops self-renewing after 420 days (15 months), but persists and may become fouled unless it has sufficient plants to keep it fresh. The spell can be cast on any size object and will remain with it regardless of the object's gravity or state

Destroy Atmosphere. Choose an object within range, you destroy up to 15 cubic miles of atmosphere around that object.