Force Dome

Area 
As Weather Dome, but the Force Dome repels any physical force or missile spell. Nothing can enter except light, and only enough light to see by (the interior is always in twilight). Likewise, nothing can leave the Force Dome except light – and not even that, if the caster wills it. However, magic, and magical creatures and items, pass through the Force Dome as though it did not exist. 
Once cast, a Force Dome takes a full second to form; anyone inside the Dome’s area at the time it is cast has one turn to leave.

Duration: 10 minutes. 
Base cost: 3 to cast. 2 to maintain. 
Prerequisites: Magery 1, Weather Dome, and Apportation.