Enclosure

Focus on a point centered on yourself. A magical enclosure, invisible to the naked eye, appears in a 10,000 foot diameter sphere. At the moment of casting, time in the sense of nature and the sun and moon stands still. Any creatures enclosed in the sphere at the time of casting, except the caster, are trapped within the sphere until either the caster dispels the enclosure or the caster dies. While the spell is active, creatures not already inside the sphere can enter and leave at will, but anything inside the sphere at the time of casting is trapped and cannot leave.