Brimstone Domain V.2.

The Brimstone Domain focuses on the unholy, fiendish energy of Hell- one of the many realms of the multiverse - that hosts all fiendish creatures, and devils. The patrons of Hell promote chaos and destruction through establishing contracts for souls, possessing unsuspecting beings, and unleashing hell upon the material plane. Almost any evil archfiend, or demon lord can claim influence over this domain, particularly Archfiends of the Nine Hells, or Demon Lords of the Abyss.

Domain Spells

The Brimstone Domain gives you access to Domain Spells at each noted level.

Level 1: Burning Hands, Hellish Rebuke

Level 3: Scorching Ray, Protection From Fire*

Level 5: Fireball, Corrupt Mind*

Level 7 : Wall of Fire, Corrupt Soul*

Level 9: Flame Strike, Hellfire Beam*

*Homebrew spells are linked, as the [spell] tooltip doesn't work for them.

Bonus Proficiencies

When you choose this domain at 1st level, you gain proficiency in the Intimidation skill, along with Infernal and Abyssal as languages.

Disciple of Hell

Also starting at 1st level, you gain resistance to being Charmed, Darkvision out to 60 feet, and deal an extra 1d6 damage when you make a successful attack against a Fiend or Demon. If you already have Darkvision, the distance is doubled.

Channel Divinity: Demonic Smite

Starting at 2nd level, you can use your Channel Divinity to deal extra damage.

As a bonus action, you wreath your weapon in hellfire, that deals an extra 2d8 Fire damage, and 1d8 Necrotic damage.

If the creature you hit is a Celestial or Fey, they take an extra 1d8 Fire damage, and 1d8 Necrotic damage.

Fiendish Form

Beginning at 6th level, you can turn into a Fiend of you choice, with a CR equal to ½ of your current level. This form lasts for 1d4+1 turns. While in this form, you still retain your alignment, personality, and Intelligence, Wisdom, and Charisma Stats. You revert back to your true form if your Fiendish Form drops to zero Hit Points, and any excess damage carries over. After you use this feature, you may not use it again until you finish a Long Rest. The duration of your form increases to 1d6+1 turns when you reach 15th level.

Fiendish Resistance.

At 8th level, you gain the ability to infuse your being with unholy energy. Once per day, you can choose to gain resistance to Fire and Necrotic damage for a number of hours equal to half your level. And whenever you take melee damage, with this effect active, you explode with hellfire and deal 3d8 Fire damage to any creature that is within 10 feet of you.

Agent of Hell

Starting at 17th level, your spells that deal Fire damage automatically deal the max number of damage for each die that would instead be rolled. For example, instead of dealing 8d6 fire damage to a creature, you instead deal 48 fire damage. You also gain immunity to all Fire damage.