Your base walking speed is 30 feet.

Your Charisma score increases by 2, and your Strength score increases by 1.
Alternatively, you can increase an ability score of your choice by 2, and a different ability score of your choice by 1.

You can speak, read, and write Common and Primordial. Primordial is a guttural language, filled with harsh syllables and hard consonants.

You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. Your ties to the Elemental Plane of Fire make your darkvision unusual: everything you see in darkness is in a shade of red, as if bathed in flames.

You have resistance to radiant and necrotic damage.

You know the Produce Flame cantrip. Once you reach 3rd level, you can cast the Burning Hands spell once with this trait as a 1st-level spell, and you regain the ability to cast it this way when you finish a long rest. Your spellcasting ability for these spells is your choice of Intelligence, Wisdom, or Charisma.

Starting at 3rd level, you can use your bonus action to erupt with dark flames, swirling around you with malicious energy. When you take this action, you can designate any number of creatures you can see to be unaffected by it, the unearthly fire flowing past them without harm.

Your transformation lasts for 1 minute or until you end it as a bonus action. During it, you shed bright light in a 10-foot radius and dim light for an additional 10 feet, and at the end of each of your turns, creatures within 10 feet of yourself take necrotic damage equal to your proficiency bonus. In addition, whenever you would deal fire damage to a creature, you can change the damage type to necrotic instead.

Once you use this trait, you can’t use it again until you finish a long rest.