Acid Storm

You create a caustic downpour of acid in a cylindrical area with a 20- foot radius, 30 feet high, extending downward from a point you can see.

For the duration, each creature that starts its turn in the area or enters the area takes 5d8 acid damage (no saving throw).

Even after leaving the area, a creature is still coated with the acid and continues taking 2d8 acid damage at the end of each of its turns.

A creature can use an action to rinse off the acid if it has water, vinegar, or another suitable substance available.

All ongoing damage ends when the spell ends.

The acid can also damage objects in the affected area, but the extent of this damage must be determined by the GM.