Insect Plague

Casting Time: 1 action
Range: 300 feet
Duration: Concentration, up to 10 minutes
Swarming, biting locusts fill a 20-foot-radius
sphere centered on a point you choose within
range.
When the area appears, each creature in it must
make a Constitution saving throw. A creature
takes 4d10 piercing damage on a failed save, or
half as much damage on a successful one.
See PHB, pg. 254.