Thunder blast

As you hold out your hands fingers spread, a blast of electricity shoots forth from your fingertips. Each creature in a 25-foot radius must make a Dexterity saving throw. A creature takes 3d6 electricity damage on a failed save, or half as much damage on a successful one.

The fire ignites any flammable objects in the area 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 2d8 for each slot level above 4st.