Caustic Strikes

You create a ring of fulminating vapors to form around each of your hands. Any time during this spell's duration that you make a melee attack with a weapon or unarmed strike, you deal an additional (1d6 + your casting ability) acid damage and cause your target to make a Constitution Saving Throw. On a failed save, they take an additional 1d6 acid damage at the start of their next turn.

At Higher Levels. When casting this spell using a spell slot of 2nd or higher level, increase both the initial and the secondary acid damage dealt by 1d6 for each spell slot level above 1st and increase the duration by 1 minute.