Damned Domain

Clerics are constantly warned about the threats from the Hells and the Abyss. Yet why should the good always lay their lives on the line? Damned domain clerics have condemned themselves by using the lesser evils to combat the greater. Clerics of this domain are able  to summon minions from both sides of the Blood War to fight their battles for them. With this power comes risk, and it is for that reason these clerics are prepared to banish the fiends.

Damned Domain Spells

Cleric level	Spells
1st	Hellish Rebuke, Protection from Good and Evil
3rd	Enlarge/Reduce, See Invisibility
5th	Dispel Good and Evil, Summon Lesser Demon
7th	Banishment, Summon Greater Demon
9th	Banishing Smite, Infernal Calling

Bonus Proficiency

When you choose this domain at 1st level, you become proficient in the languages Infernal and Abyssal. You also gain Fire Bolt as a bonus cantrip, this does not count towards the number of cantrips you know.

Demonology

Also starting at 1st level, whenever you roll an ability check or saving throw relating to a fiend you roll with advantage and add your proficiency bonus.

Channel Divinity: Fiendish Presence

As an action, each creature of your choice equal to your proficiency bonus that can see or hear you within 30 feet of you must succeed on a Wisdom saving throw or be frightened by you. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature's saving throw is successful or the effect ends for it, the creature is immune to the Fiendish Presence for the next 24 hours.

Supreme Summoner

Beginning at 6th level, your knowledge of summoning has improved greatly, now when you make a concentration check to maintain your summoning spell you add the bonuses from Demonology. As well as this, you now have a mental link to your fiendish summons, where you once had to command them verbally, now you can command them with a thought.

Potent Spellcasting

You add your Wisdom modifier to the damage you deal with any cleric cantrip.

Rites of Banishment and Binding

Starting at 17th level, you can cast the spell Banishment without using one of your spell slots for a number of times equal to half your proficiency bonus (3), after which you begin to use your spell slots. You regain this feature after a long rest. As well as this, the target of the spell must roll their Charisma saving throw at disadvantage. You gain access to the spell Planar Binding.