Shield

Regular 
Conjures an invisible shield of magical force that moves to protect the subject from frontal attacks. The Defense Bonus granted by this spell is cumulative with that from an actual shield, but this spell does not allow a subject without a shield to block. Defense Bonus granted by Shield is not cumulative with any granted by Block.

Duration: 1 minute. 
Cost: Twice the Defense Bonus given to the subject, to a maximum DB of 4 (cost 8). Half that to maintain. 
Prerequisite: Magery 2.

Item 
None with this spell – but the armor enchantment called Deflect can increase your Defense Bonus by 1 to 5 points.