Thunderwave

Cast Time: 1 Action | Range: Self(15ft Cube)
Mats: V, S | Duration: Instant
A wave of thunder sweeps from you, audible
for 300 feet and pushing unsecured objects 10 ft.
Creatures in range make a Constitution saving
throw. If failed, creatures take 2d8 thunder
damage and are pushed 10 ft. Otherwise they
take half damage and are not pushed.
Levels: +1d8 per level above 1st