Burning Soul

Your soul burns brightly even in the coldest and darkest times.  Whether from a magical bloodline mixed in with an elemental or by the happenstance of wild magic you were born with an ability to control flames and at least a small lust to watch the world burn.  Often discovered the first time you were drawn to touch fire as a child and returned unburnt your magical abilities were clear, and dangerous, from a young age.

Soul of Fire

Your inner burning soul grants you resistance to fire damage and you can no longer feel the effects of cold weather.

Heart of Flames

Your inner flame frequently needs a release often through the use of fire magic but also in the form of an ability called Heart of Flames.  Once per short rest, as a bonus action, you may activate this ability causing your eyes and hair to glow with power of a burning orange flame lasting ofr up to an hour.  This casts bright light out to 20ft and dim light out to 40ft and grants you darkvision out to 120ft.

Burnt to Ash

Spells that deal fire damage deal an additional d4 fire damage.  Once per long rest, while Heart of Flames is active, you can enhance your power, as an action, for up to a minute causing the flames on your body to glow a bright blue instead of orange. During this time all enemies within 10ft of you take 1d4 fire damage  at the start of their turn and all spells dealing fire damage cast by you deal maximum damage.  Additionally, you have advantage on Charisma (Intimidation) checks while active and creatures that have been intimidated by you and take fire damage from you become Frightened of you.

Atop the Pyre

Once per short rest when you go down for the first time a fiery explosion comes from your body out to a radius of 30ft.  All creatures of your choice within the radius must make a dexterity saving throw against you spell save DC taking 4d6 + your Sorcerer level of fire damage on a failed save of half as much on a success. Additionally, while Heart of Flames is active you gain a fly speed equal to your walking speed by blasting jets of fire out of your hands, however you must use a bonus action to hover.

Soul Ablaze

You have learned to have complete control over your abilities granting you several abilities.  You are now immune to fire damage and have learned the control flames cantrip if not already learned.  When you cast a spell that deals fire damage you may use one Sorcery Point to change the damage type to Wyldfyre fire damage and two Sorcery Points to change the damage to Hellfire fire damage.  Once per long rest when fire damage is dealt to you, as a reaction, you can instead half the damage and restore that many Hit Points.  Additionally, while Heart of Flames is active, as a bonus action, you can teleport up to 30ft to an unoccupied space you can see in a small burst of flames that deals fire damage equal to half of your Sorcerer Level to creatures of your choice within 5ft of both the space you leave and teleport to.