Acid ray

You create a line of acid 120 feet long and 5 feet wide, and goes through any object less than 10 feet in diameter. Any creature in the area must make a constitution saving throw. On a failed save, the creature takes 8d6 acid damage and is blind for 1 minute. On a successful save, the creature takes half as much damage and is not blind. This spell also rusts all metallic objects in the area.

At higher levels: For each level above 4th, the creature takes 2d6 extra acid damage.