The Rumbling Roaring Fart

You unleash a powerful, reverberating blast of sound and flatulence energy, reminiscent of a thunderous fart mixed with a mighty gust of wind. The fart wave of force erupts from you, sending nearby foes flying back as the air trembles with flatulence. Each creature in a 15-foot Cube originating from you makes a Constitution saving throw. On a failed save, a creature takes 2d8 of stench damage and is pushed 10 feet away from you. On a successful save, a creature takes half as much damage only.

In addition, unsecured objects that are entirely within the Cube are pushed 10 feet away from you, and a thunderous fart is audible within 300 feet.

Using a Higher-Level Spell Slot. The damage increases by 1d8 for each spell slot level above 1.