Path of Volatile Passion

The beaten and bloodied man stumbles back as he nearly avoids being bisected by the corrupted remains of his former friends axe that had once been used only in self defense. The axe bite into the stone bellow making a large crunching sound as the beaten man got a brief second to consider his options and reflect on what to do next now that he had a second to breathe. The remains of his party was littered around him each more dead then the last, it hurt his heart to be reminded of his failure for if he had not be frightened by unknown creature lurking in the darkness that surrounded him could have done anything to help. But instead he let fear sink into him making him weak and nothing but dead weight to his former friends. 

And now he was going to pay for his failures in his own guilt ridden blood. The beaten man desperately blocked the corrupted paladins axe once again as the darkness once again cackled at his failings, seconds ticked by as the beaten man drew weaker and weaker as the one sided beat down drew closer and closer to its conclusion. Then like a flicker of light made itself known as the beaten man successfully parried his former friend with a loud yell and a declaration of vengeance to the entity that put him through this. The flicker of light grew hotter as the beaten man pushed himself forward powered only by the raw emotions that raged inside of him. 

With each clash he grew bolder, stronger, brighter, and warmer. Heat began to roll of the beaten man and illuminate his battlefield with a burning glow. Then with one mighty crash the man shattered his friends axe and exploded in a ball of fire. Then otherworldly entity puppeting the paladin was illuminated by the sudden burst of light in all of its terrible glory as it stared perplexed at the beaten mans sudden second wind.

The ball of fire began to take shape as the beaten man stepped out from its warmth and absorbed it. A grim determination now replaced his once tear stained face as the burning flame of passion radiated from his mortal soul, the man had made his decision. The guilt was his to bear. The fault was entirely his. But no one was going to cry for him. He'd embrace the burden of his volatile passions and guide himself to his desired outcome. And with that revelation he bursted forth through the air with a single wing made from the flames ready to resume his emotion filled fiery rage with a battle cry that invoked the same fear into the monster that he once had inflicted on him.

Alit Soul

Upon choosing this subclass at 3rd level you gain a resistance to fire damage and any fire based damage you deal ignores resistance due to your burning soul.

Ominous Power

Upon choosing this subclass at 3rd level your soul begins to crackle with an ominous power. As a special action you can add a 1d4 to any damage roll, hit roll, saving throw, ability check or class feature. If the extra die is used on a damage roll then its damage will be magical fire damage. This die increases to a 1d6 at 6th level then a 1d8 at 10th, 1d10 at 14th, and finally a 1d12 at 16th.

You can use this feature equal to 2 + proficiency bonus and you recover 1d8 expended charges on a short rest and recover all expended charges on a long rest.

Emotional Endurance

At 6th level you can now will yourself past your limits and clash with an enemy that attacks you. While raging as a reaction to a melee attack you can make a melee attack of your own and if your hit roll is higher than theirs negate their attack, if this reaction succeeds you may repeat it to the same target until it fails.

You can use this feature a number of times equal to your constitution modifier and this feature is regained on long rest.

Bright Soul

Upon reaching 10th level your soul will burn bright and shining for all to see as fire no longer burns you and fear is an illusion to your mind. You gain immunity to fire damage, immunity to being frightened, and you ignore resistance and immunity when dealing magical fire damage.

Distorted Self Image

Starting at 10th level you have learned to manifest your mental twisted version of what you think of yourself, whether it be good or bad is up to you. When you enter a rage, you can transform, becoming your own distorted self image. Until your rage ends your size is considered large if it was not large already, you also gain advantage on all saving throws, and you manifest a plethora of new features exclusive to the Distort Self Image form.  (Note: You can only use one of these new features per turn.)

This feature may only be used once before you must take a long rest to regain this feature.

New features that are only usable in Distorted Self Image form:

Horrifying Delusions. Your mere glance is enough to put someone into a delirious hysteria. As a bonus action you can force someone within your view to make a charisma saving throw (DC 8 + strength modifier + proficiency bonus) if they fail the save then they are frightened until the end of your next turn.

Cauterizing Hunger. Your body is now a cascade of blazing fury and that grants you a natural weapon. It deals 3d4 + strength modifier of slashing, piercing, bludgeoning, or fire damage of your choice. As part of this melee attack you can gain temporary hit points equal to proficiency bonus once per turn.

Blazing Charge. You charge forward wreathed in flames. As an action you can blaze forward in a 30 foot line, the first creature you hit in this line must make a dexterity saving throw (8 + strength modifier + proficiency bonus). The creature will take 3d4 fire damage on a failed save and half as much on a successful save. In addition you can choose to stop on the first creature hit or continue to move through them, however if you come into contact with another creature after the first the charge ends. (Note the damage only applies to the first creature hit.)

Grasping Regret. Escaping your endless enmity was never an option for the enemy. As apart of a melee attack you can force someone to make a grapple check and if they fail then obviously are grappled. As a bonus action you may cause 1d8 fire damage to whoever is being grappled.

Volatile Realization. Your new form explodes in the echoes of your fiery emotions. As an action you may choose to create an explosive of fire rage around you. This blast goes 8d6 magical fire damage in a 30 foot sphere centered on you, the creatures in this sphere must make a (DC 8 + strength modifier + proficiency bonus) dexterity saving throw and should the creature succeed they will take half damage. In addition this attack deals double damage to structures. 

This feature may only be used twice before you must take a long rest to regain this feature.

Self Realization

Upon reach 14th level you have learned to move past your own perception of yourself and thusly have gained the ability to use its powers particularly without transforming yourself. You may choose one feature from the Distorted Self Image's features and may use it in your normal state rather then exclusively in your distorted state. 

Also you may change the feature that is available to you on a short rest.