Blazing Burst

Taking control of this power, your gifted the ability to control your own flames and cause the fire within yourself to burst outwards in fury or kindness. 

Awakening Flame

At 3rd level you can change your monk weapon damage type to fire damage instead of bludgeoning damage, as well as you can fire a 20 foot line of 5ft thick flame from within you, for an attack action, doing 1d8 fire damage to everyone within the line on a failed dex save against your monk save DC, you can add on an extra 1d8 fire damage for 2 ki points. 

Burning Pyre

After an attack using one of your fire abilities you can immediately use your movement action to fly 20 feet in any direction as you take 1d6 fire damage, you can launch yourself an extra 5 feet by taking 1d6 more damage for every extra 5 feet you go.

Ignited Soul

At 11th level once per long rest, you let the fire surging through your soul to activate and you become covered in a wreath of flame and rage, you gain 2 AC, as well as +2 to your damage rolls, but every type of damage you do is replaced with fire damage. This can lead to the weapon you have in your hand burning or melting, as well as you run the risk of lighting your stuff on fire if it is on your body. In addition you can use your flying speed in place of your movement speed without taking an attack action first, as well as instead of going an extra 5 feet for taking an extra 1d6 fire damage, you can add on 10 feet for 1d6 fire damage. You are resistant to fire damage while in this form.

Roaring Blaze

17th level ability, as an action you can summon a tornado of flame from the deepest parts of your very soul, letting it flourish out in the world, a 50/50 big pillar of flame spawns at a place within 100 ft area around you, you can control this on subsequent turns using a bonus action, it has a movement of 30 ft. This pillar lasts for 1 minute or until you stop using your bonus action to maintain it. Creatures inside take 5d10 fire damage at the start of each of their turns while inside, creatures can make a strength check whenever they first move away from the center of the tornado, if they fail they are drawn back to the center. Because this fire is not from this world and is from deep within your soul, the fire damage this tornado causes ignores resistance and creatures that would have immunity have resistance. You can do this once per long rest.