Mage Armor

Casting Time: 1 action
Range: Touch
Target: A willing creature who isn't wearing armor
Duration: 8 hours

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 13 + its Dexterity modifier. The spell ends if the target dons armor or if you dismiss the spell as an action.