Fireball

D&D 2024 spell: Fireball. Source: Player's Handbook (2024). level 3, school Evocation, casting time 1 action, range 150 feet, duration Instantaneous

A bright streak flashes from you to a point you choose within range and then blossoms with a low roar into a fiery explosion. Each creature in a 20-foot-radius Sphere [Area of Effect] centered on that point makes a Dexterity saving throw, taking 8d6 Fire damage on a failed save or half as much damage on a successful one. Flammable objects in the area that aren't being worn or carried start burning.

At Higher Levels

Using a Higher-Level Spell Slot The damage increases by 8d6 for each spell slot level above 3.

Source: Player's Handbook (2024), p. 274 - Licenses and attribution