Corrosive Spray

You unleash a spray of acid within a 20-foot cone starting at yourself. All creatures in range of the spell must make a Constitution saving throw, taking 2d6 acid damage on a failure and half as much on a success. If a target wearing nonmetal, nonmagical armor fails this saving throw, their AC is reduced by 1. 

At higher levels. When you cast this spell at higher levels, increase the damage dealt by 1d6 for each level above 1st.