PHB

Control Flames

0-level (Cantrip) Transmutation

You choose nonmagical flame that you can see within range and that fits within a 5-foot cube. You affect it in one of the following ways:

• You instantaneously expand the flame 5 feet in one direction, provided that wood or other fuel is present in the new location.
• You instantaneously extinguish the flames within the cube.
• You double or halve the area of bright light and dim light cast by the flame, change its color, or both. The change lasts for 1 hour.
• You cause simple shapes — such as the vague form of a creature, an inanimate object, or a location — to appear within the flames and animate as you like. The shapes last for 1 hour.

PHB

Create Bonfire

0-level (Cantrip) Conjuration

You create a bonfire on ground that you can see within range. Until the spell ends, the magic bonfire fills a 5-foot cube. Any creature in the bonfire's space when you cast the spell must succeed on a Dexterity saving throw or take 1d8 fire damage. A creature must also make the saving throw when it moves into the bonfire's space for the first time on a turn or ends its turn there.   The bonfire ignites flammable objects in its area that aren’t being worn or carried.
At higher levels: The spell's damage increases by 1d8 when you reach 5th level ( 2d8 ), 11th level ( 3d8 ), and 17th level ( 4d8 ).

Xanathar's Guide to Everything

Flame Arrows

2-level Evocation

You touch a quiver containing arrows or bolts. When a target is hit by a ranged weapon attack using a piece of ammunition drawn from the quiver, the target takes an extra 1d6 fire damage. The spell’s magic ends on the piece of ammunition when it hits or misses, and the spell ends when twelve pieces of ammunition have been drawn from the quiver.
At higher levels: When you cast this spell using a spell slot of 4th level or higher, the number of pieces of ammunition you can affect with this spell increases by two for each slot level above 3rd.

Mordenkainen's Lost Notebook

Pyrotechnics

2-level Transmutation

You cause one of two effects originating from a source of a fire within range. You can cause the fire to erupt in a bright display of fireworks that causes all creatures within 60 feet of the fire that rely on vision and have a direct line of sight to it to make a Constitution saving throw or be blinded until the end of their next turn. Alternatively, you can cause the fire to be extinguished and give off a billowing cloud of smoke that fills surrounding spaces within 5 feet of it and then continues to move outward from the fire source. The cloud fills all spaces within 5 feet of it on the first turn, and then moves outward from the previous adjacent spaces another 5 feet at the beginning of each of your turns for the duration (1 minute). The cloud is toxic and heavily obscured. Any creature that starts its turn within the cloud or enters its area for the first time on a turn has disadvantage on all d20 rolls that turn.

Xanathar's Guide to Everything

Immolation

5-level Evocation

Flames wreathe one creature you can see within range. The target must make a Dexterity saving throw. It takes 10d6 fire damage on a failed save, or half as much damage on a successful one. On a failed save, the target burns with magical fire for the spell’s duration. The burning target sheds bright light in a 30-foot radius and dim light for an additional 30 feet. At the end of each of its turns, the target repeats the saving throw. It takes 4d6 fire damage on a failed save, and the spell ends on a successful one. The flames of this spell ignores fire resistance. These magical flames can’t be extinguished by nonmagical means. If damage from this spell kills a target, the target is turned to ash.