Fireblast

A marble-sized ball of flame appears in your hand before darting out and exploding at a point you choose within range. Every creature within 20 feet of the point must make a Dexterity saving throw, taking 7d6 fire damage on a failure of half as much on a success.

The blast spreads around corners and ignites flammable objects that aren’t being worn or carried.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.