Acid rain begins falling within a 40-foot-radius, 60-foot-high cylinder centered on a point you choose within range. When a creature moves into the spell’s area for the first time on a turn or starts its turn there, it must make a Dexterity saving throw. On a failure, it takes 6d4 acid damage and is covered in acid. On a success, a creature takes half the initial damage and is not covered in acid.   A creature takes 3d4 acid damage if it ends its turn while covered in acid. The target or a creature within 5 feet of it can end this damage by using its action to clear away the acid.