Acid Rain

A 10 foot radius of acid rain appears in an unoccupied space of your choice within range and lasts for the duration. The area where acid rain is at becomes difficult terrain. When a creature moves into the spell’s area for the first time on a turn or starts its turn there that creature takes 1d4+spellcasting ability acid damage. When a creature leaves the spell area it takes an additional 1d4 acid damage.

When you cast this spell using a spell slot of 3nd level or higher, the damage increases by 1d4 for each slot level above 2st.