Acid Smite

Your weapon becomes coated in green acidic slime. The next time you hit with a melee weapon attack during this spell’s duration, your attack deals an extra 4d4 acid damage immediately and 2d4 acid damage at the end of its next turn.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage (both initial and later) increases by 1d4 for each slot level above 2nd.