Fireball

Fireball
3rd-level evocation
Casting Time: 1 action
Range: 150 feet
Components: V, S, M (a tiny ball of bat guano and sulfur)
Duration: Instantaneous
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.

The fire spreads around corners. It ignites flammable objects in the area that aren't being worn or carried.

-Player's Handbook