blue fireball

As you feel the fire dying you summon souls for the fire then as you shoot the fire at your enemy it then blossoms with a low roar into an explosion of blue flame. Each creature in a 20-foot-radius sphere centered on that point must make a Dexterity saving throw. A target takes 7d10 fire damage on a failed save, or half as much damage on a successful one.

The fire spreads around corners. It ignites 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 6th level or higher, the damage increases by 1d10 for each slot level above 5th.