Fire Attunement

Beginning at first level, you have the ability to maintain and manipulate fire with exceptional ease, so long as it is conjured by your being.

Produce Flame. You have access to the cantrip Produce Flame as a bonus action, rather than an action. You can use this cantrip in combat three times before needing to long rest. 

At Higher Levels. At level 9, you gain the ability Abyssal Rage. 

Abyssal Rage. Produce Flame spreads to the rest of your body, enveloping you in hellish flames. Any creatures within a 10ft radius of you take 1d10 fire damage, including friendly creatures. Casting hellish rebuke while Abyssal Raging adds 1d10 to your damage roll.