Domain of Corruption

Gods whose names have long been lost from the passage of time, appearing in dreams and visions of potential vassals, whispering of their demand and promise of power for those who pledge their faith to them. Followers of this domain are known to others as clerics who have fallen from grace, straying from their path, and becoming faithless, but little did they know that their devotion to these faceless and nameless Gods are true and strong as the moment they have made their pact, any faults in their faith towards them becomes a step closer to death as their God refuses to remain forgotten.    

Spell Table

Level	Spell
1st	Bane, Inflict Wounds
3rd	Blindness/Deafness, Darkness
5th	Bestow Curse, Fear
7th	Black Tentacles, Phantasmal Killer
9th	Contagion, Contact Other Plane

Forgotten Words

When you choose this domain at 1st level, you learn how to speak, read and write Deep Speech.    

Malefic Sight

Starting when you choose this domain at 1st level, you are bestowed with a gift from your God upon request, despite the brief painful process, gives you vision far stronger. You choose to either gain Darkvision or Blindsight for up to 1 minute + an additional minute equal to your cleric level, but you are first momentarily blinded for half of the duration you choose. After using this feature, regardless of the duration, you need to finish a Long Rest before you can use it again.    

Channel Divinity: Blessing of Madness

Starting at 2nd level, you use your Channel Divinity to feed from the sanity of your foes. As an action, choose a creature you can see within 30 feet of you and is suffering from blinded, deafened, frightened, unconscious due to an effect or is suffering from madness, either naturally or through an effect or is at 3rd level of exhaustion and marks them for feeding. The first attack against the creature gain advantage and causes the attacker to regain hit points equal to d8 + your cleric level and you also regain hit points equal to half of that amount (rounded down). If you attack the creature, you regain hit points equal to d10 + cleric level instead. The mark fades after the creature receives an attack. For each condition listed above affecting the target, add another d4.    

Channel Divinity: Descend to Madness

Starting at 6th level, you can use your Channel Divinity to burn the image of your God in their mind. As an action, choose a creature you can see within 60 feet, the creature must succeed a Intelligence saving throw otherwise become stunned until the start of their next turn. At the start of their turn, they must succeed a Wisdom saving throw or fall prone and become frightened for 10 minutes. The creature may spend their action to make a Wisdom saving throw on each of their turns to regain their sanity and remove both conditions, but if the effect passes the 5-minute mark, the creature gain a level of exhaustion and will suffer from short-term madness. If the effect lasts for a full 10 minutes, the effect ends and gains another level of exhaustion and will suffer from long-term madness.    

Potent Spellcasting

Starting at 8th level, you add your Wisdom modifier to the damage you deal with any cleric cantrip.    

Embodiment of Old

At 17th level, you are granted an audience for your loyalty and devotion from your God. After you contact your God, either mentally through speaking in your mind or physically through moving to your God's plane of existence, you emanate a mysterious aura that lasts for 1 minute + half of your cleric level (rounded down) thanks to the revelation or teaching you've been granted as well regaining expended uses of Channel Divinity. Hostile creatures in 10 meters around you must succeed a Wisdom saving check each minute they remain in radius or otherwise they take 6d10 psychic damage. Hostile creatures who are 5 meters closer to you suffers disadvantage to their Wisdom saving check. You may also choose to direct your revelation or teaching to a creature you can see within 30 feet, speaking in Deep Speech and they must make a Wisdom saving check with advantage or otherwise they suffer from indefinite madness, and you lose your aura after. Does not affect creatures that naturally knows Deep Speech. Regardless of how many times you made contact with your God, you are only granted a revelation or a teaching once per day.