Your base walking speed is 30 feet

You have immunity to fire damage.

When reduced to 0 hit points, you can choose to explode in a burst of fire, dealing damage to creatures within a 10-foot radius. The damage is 1d6 fire damage per character level. After the explosion, you return to life with 1 hit point in a smaller form. Your Strength, Dexterity, and Constitution scores are reduced by 3. Each day, you regain 1 point in each of these scores as you rapidly regrow back to your original size.

You have a pair of wings that grants you a flight speed of 30 feet.

You know the produce flame cantrip. At 3rd level, you can cast burning hands once per day as a 1st-level spell. Additionally, your produce flame cantrip can heat and melt metal given enough time.

As a bieng of fire you generate exess thermal energy. You cast bright light in a 5-foot radius and dim light for an additional 5 feet, and your body is hot to the touch dealing 1 fire damage to anything that touches you without protection.

Your Charisma score increases by 2, and one other ability score of your choice increases by 1.