When casting this spell upon yourself you lose any benefit to wearing armor. You rapidly develop hundreds of tough, small, mineralized scales arrayed in overlapping shell plates over your torso, arms, and legs. These plates are the same color as your skin. You may wear loose clothing over them. The scales are highly flexible and protective natural armor. Your base AC becomes 14 + your Dexterity modifier (max of 2). The spell ends after the duration, upon a successful dispel, if you don other armor, or if you dismiss the spell as an action.