xp to level 3 missile fireball

A bright streak flashes from your pointing finger to a point you choose within range and then blossoms with a low roar into an explosion of flame. Each creature in a 20-foot-radius sphere centered on that point must make a Dexterity saving throw. A target takes 8d6 fire damage on a failed save, or half as much damage on a successful one. if fireball doesnt hit the auto cast of magic missile rolling 1d4 +int modifer and this can not missed 

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 4th level or higher, the damage increases by 1d6 for each slot level above 3rd. When you cast this spell using a spell slot of 2nd level or higher, the spell creates one more dart for each slot above 1st also using skit if 4th level spell roll another 1d4 + int modifer.