Magicka Serella

Improved Mage Armor

3-level Conjuration

You touch a willing creature who isn’t wearing armor, and a protective magical force surrounds it until the spell ends. The target’s base AC becomes 17 + its Dexterity modifier. The spell ends if the target dons armor or if you dismiss the spell as an action.
At higher levels: When you cast this spell using a spell slot of 4th level or higher, the duration increases by 1 hour for each slot level above 3rd.