Source: Player's Handbook
Level 3 Evocation (Sorcerer, Wizard)
Casting Time: Action
Range: 150 feet
Components: V, S, M (a ball of bat guano and sulfur)
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 centered on that point makes
a Dexterity saving throw, taking
Flammable objects in the area that aren’t being worn or carried start burning.
Using a Higher-Level Spell Slot. The damage increases by 1d6 for each spell slot level above 3.