blood rain

You concentrate a curse around an area, summoning a painful blood stained rain, Every creature inside a 20ft cube you can summon within range must succeed a dexterity saving throw or receive 7d6 acid damage on a failed save, or half as much on a succesful save. If the creature doesn´t move from the area, the creature receives 1d6 acid damage.

Also, any object carried or worn must succeed a saving throw or receive a full damage as well, if the object turns to 0 hp, the object is destroyed.

At higher levels, you can extend the range of 20 ft at each spell level you have expended.