Acid Grenade

A livid neon yellow ball of liquid is shot at a target in range, bursting open and washing what it hits in a viscous and tenacious acid. Choose an object or structure or creature in range, and it must make a Dexterity saving throw. On a failure, it takes 4d4 Acid damage and is marked for a minute; on a success, it takes half damage and is not marked. When marked targets fail further saving throws against your subsequent castings of this spell, they take an additional cumulative 2d4 Acid damage.

When you cast this spell using a spell slot of 2nd level or higher, the damage (both initial and cumulative) increases by 1d4 for each slot level above 1st.