The Hellfire

Hellfire Warlocks are rare, but there is no mistaking them. Possessing barely-controlled power and a temper inflamed with infernal energy, those who wield hellfire find it hard to keep their abilities a secret for long.

It is said by most arcane scholars that this pact can only be made with hellfire's creator, Mephistopheles, Lord of Cania, the Eighth Circle of the Nine Hells. While this is mostly accurate, there are rumors within less reputable occult circles that Mephistopholes's creation has gained sentience, and a yearning to be released from Cania to spread across the planes unchecked. If this is true, it may be possible for those with an undiscerning lust for power to forge a pact with the sentient flames themselves.

However the pact is made, it takes a heavy toll. Aside from the deleterious effect hellfire has on mortal bodies, Mephistopheles is known to be a demanding and fickle patron. A pact made directly with the living fires of hell is potentially even more dangerous. Mephistopheles doesn't take kindly to those who wield his power without his consent, and the symbiotic relationship that results from a pact made in this way can sometimes make it difficult for the Warlock to discern between their own thoughts and the ravenous hunger of the flames they wield.

Expanded Spell List

The Hellfire lets you choose from an expanded list of spells when you learn a warlock spell. The following spells are added to the warlock spell list for you.

Hellfire Expanded Spells

Spell Level	Spells
1st	burning hands, absorb elements
2nd	scorching ray, flame blade
3rd	fireball, protection from energy
4th	fire shield, wall of fire
5th	flame strike, immolation, Conjure Hell Hounds(* my homebrew spell for this subclass)

Conjure Hellfire

Beginning at 1st level, the damage type of your eldritch blast cantrip changes to fire. This damage ignores fire resistance and does half damage to creatures with fire immunity.

Additionally, you gain the ability to temporarily channel greater amounts of hellfire through your own body, at a cost. When you attack with your eldritch blast or a spell of 1st level or higher that does fire damage, you can expend one of your Warlock hit dice to add an additional 1d12 fire damage to the roll. The additional damage ignores resistance and immunity to fire damage.

If you use this feature and you have no Warlock hit dice left, you take a level of exhaustion.

At lvl 11, you can choose to expend two Warlock hit dice, instead of one.

Winged Fury

Starting at 6th level, you can use a bonus action to manifest wings composed of hellfire. While this feature is active you gain a flying speed of 60ft. While this feature is active you gain resistance to fire damage. The wings disappear if you fall unconscious or fall to 0 hit points.

Once you use this feature, you can’t use it again until you finish a short rest.

Channel Hellfire

Starting at 10th level, you learn to infuse existing flames with the essence of hellfire. Any flames you affect using your control flames cantrip gains the following qualities while you are exerting control over them:

• They spread at a rate of 10 feet per turn under your direction, instead of 5.
• The flames seem disconcertingly alive and are difficult to extinguish. Anyone who catches fire from these flames rolls at disadvantage when they try to put themselves out.
• The flames ignore fire resistance.

Additionally, any lingering flames created by a spell empowered with your Conjure Hellfire feature, such as flaming hands, can be controlled using your control flames cantrip.

Ignite Soul

Starting at 14th level, when you hit a creature with your hellfire blast, you can use this feature to ignite their soul. The target must make a Charisma saving throw, taking 5d10 fire damage and 5d10 psychic damage on a failed save, or half as much on a successful one. The fire damage ignores fire resistance and immunity to fire damage. If the target falls to 0 hit points as a result of this damage done by this feature, you regain three expended hit dice, up to your maximum number of hit dice. This damage does not benefit from critical hits.

Once you use this feature, you can't use it again until you finish a long rest.