Thunderwave

1st level, Range and Target: Self (15-foot cube)
A wave of thunderous force sweeps out from you.
Each creature in a 15-foot cube originating from
you must make a Constitution saving throw.
Failed save: a creature takes 2d8 thunder damage, pushed 10 feet away from you.
Successful save: the creature takes 1/2 damage
and is not pushed.
The spell emits a thunderous boom audible
out to 300 feet.