Eldritch Armor

You summon an ethereal aspect of your patrons visage, to guard you and protect you at times of need. This ethereal looking armor, protects you from any incoming damage against your body. If you are already wearing medium or heavy armor, this spell automatically fails.

You gain a +3 bonus to AC for the duration. The AC bonus is reduced by 1 each time you are hit by an attack: thus after the third attack hits you, the spell ends.