Path of the Infernal Prison

High atop the mountains in a place only known to those shown the way, sits a monastery of holy sages dedicated to maintaining the balance in the world, never to allow evil to reign. These sages are known as the Wardens and they hold the keys to an array of magical prisons, holding some of the world's most fiendish beings at bay. In an effort to protect a prison from those who wish to open them, the Wardens appoint a warrior as it's keeper, locking the infernal entity within them. It is a great honor to be chosen and led to the monastery, and those who have become keepers are spoken of as ferocious warriors of legend no mere man can fell.

Infernal Knowledge

Your rage has cracked the barrier separating you from the entity sealed away within you. At 3rd level when you unleash this path, you gain the ability to speak, read, and write Infernal. In addition you also gain proficiency in history and intimidation. 

Infernal Rage

At 3rd level, your rage begins to tap into the ancient power of your infernal prisoner. When you rage you may decide to enter an infernal rage. When you do so, all creatures in a 5ft radius take 1d4 fire damage, and you manifest one of three aspects of the infernal prisoner. The aspect and its respective benefits are determined by rolling a d6. The fire damage increases at (1d6)6th, (1d8)10th, and (1d10)14th levels. 

Aspects of the Infernal Prisoner

d6	aspect and effects
1-2	Hide of the Infernal: An ethereal aura of flame engulfs your body strengthening your resolve. Whenever you are hit with a melee attack, you may use your reaction to reduce the damage dealt by an amount equal to your constitution modifier.
3-4	Wrath of the Infernal: Your eyes,  hands, and feet glow with an ethereal flame. Your unarmed strikes deal an additional 1d6 fire damage, your walking speed increases by 10ft, and you may dash as a bonus action.
5-6	Wings of the Infernal: Wings of ethereal flame bust from your back, and you gain a flying speed equal to your walking speed for the duration.

Infernal Presence

At 6th level, while in your infernal rage, you gain a resistance to fire damage. In addition whenever you take fire damage you add 1d6 fire damage to your next attack

Infernal Rank

At 10th level, your rage has become fully entwined with your infernal prisoner. Fiends, imps, devils, and demons can see your infernal prisoner's true face. The same is true for those with truesight and the ability to see into the ethereal plane. When a creature perceives your infernal prisoner's true face they must succeed a WIS saving throw (DC equals 8 + proficiency + charisma modifier) or become frightened and fall prone. If a 1 is rolled, a creature critically fails the save and becomes charmed by you. Whenever the creature is dealt damage they may repeat this save. On a success all effects end. 

Infernal Awakening

At 14th level, your rage has a chance of unleashing intense power. You now roll 3d6 instead of 1d6 when determining the aspect of your infernal rage. For each result you manifest the corresponding aspect. If two or more results correspond to the same aspect, only count one of those results. For example, if you roll 1, 2, 4, you manifest the first and second aspects. If you roll 1, 1, 2, you only manifest the first where conversely, if you roll 2, 3, 5, you manifest all three. Each creature within 5ft of you makes a DEX saving throw (DC equals 8 + your proficiency + you constitution modifier), taking 1d10 fire damage for each aspect manifested on a failed save. Creatures that succeed take half.