Spell Level: 3
Spell School: Evocation
Casting Time: 1 Action
Components: V, S, M (a ball of bat guano and sulfur)
Range: 150 ft.
Area: 20 ft. Sphere
Duration: Instantaneous
Conditions/Effects: Damage (Fire)
Saving Throw: Dexterity
Ritual: No
Scaling: Spell Slot Level
Classes: Sorcerer, Wizard, Fiend Patron, Light Domain
Link: Link to source
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 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.
Using a Higher-Level Spell Slot. The damage increases by 1d6 for each spell slot level above 3.