Dust of Sneezing and Choking

There is enough sand in this pocket for one use.
As an action you throw a handful of the sand into
the air. You and each creature that needs to
breathe within 30 feet of you must succeed on a
DC 15 Constitution saving throw or become
unable to breathe. A creature affected this way is
incapacitated and suffocating. A creature can
repeat the saving throw at the end of each of its
turns, ending the effect on a success. The lesser
restoration spell can also end the effect on a
creat