burning fireball

A brilliant flash shoots from you toward a point you choose within range, then transforms with a low roar into a fiery explosion. Each creature in a 20-foot radius sphere centered on that point makes a Dexterity saving throw, taking 8d6 Fire damage on a failed save or half that damage on a successful one.

Flammable objects in the area that are not being used or carried begin to burn.

Using a higher-level spell slot. Damage increases by 1d6 for each spell slot level above 3rd.