Acidic Armor

You form a bubble of acid around yourself that protects you from harm. When a creature within 10 feet of you attempts to attack you while the spell is active, it must make a Dexterity saving throw or take 1d8 acid damage and be covered in acid. At the end of its next turn, it takes 1d4 acid damage unless it uses its action to wipe the acid off.

As a bonus action, you can pop the bubble, causing it to explode. When you do so, all creatures within 10 feet of you must make a Dexterity saving throw, taking 2d8 acid damage on a failed save, or half as much on a successful one. A creature that fails this saving throw is covered in acid, as described above.

At Higher Levels. When you cast this spell using a spell slot of 3nd level or higher, it deals an additional 1d8 damage for each spell level above 1st.