Thunderwave

V, S
{t}: Each creature in a 15-foot cube originating from you takes [SSL+1]d8 thunder damage and is pushed 10 feet away from you.
CON save for half damage and resist push.
Unsecured objects that are completely within the area of effect are pushed 10 feet away from you
by the spell's effect. The spell emits a thunderous boom audible out to 300 feet.