Alastrarra's Atmospheric Alteration

A sudden cavitation, painfully intense, erupts from yourself or a creature of your choice within range. Each creature in a 10-foot-radius sphere centered on the specified creature must make a Intelligence saving throw. A creature takes 3d8 force damage and is pushed back to the radius of the spell on a failed save, or half as much damage on a successful one. When cast upon a metallic surface the spell damage increases by 1d8. Any creature made of inorganic material such as stone, crystal, or metal has disadvantage on this saving throw.

Any nonmagical objects that aren't being worn or carried also take the damage within the spell's area of effect.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d8 and the radius of the spells effect increases by 5ft for each slot level above 1st.