Arcane symbols swarm around you until forming around your arm then into your hand before shooting out. 1 foot infront of you a magical semi opaque shield appears in front of you. The shield has a radius of 5 feet and is semi spherical. Depending on the direction it is facing you gain a +7 to your armor class, and if anything that does damage has an area of effect hits the shield then you take no damage from it. You can control the direction that the shield is facing and which ever direction you pick is the one that you gain the armor class in. If you are attack from a different direction, use your normal ac. 

When you cast this spell using a 6th level spell slot or higher you gain an additional, +1 and 5 feet added to the radius for every spell slot higher.