Heretics

Excommunicated from their religious orders, the founders of the Order of Heretics were holy priests who desired to utilize forbidden rites to combat darkness. Branded heretics, these conduits of divine power supplemented their holy knowledge with blood magic. Now, this Order of priestly Blood Hunters works to combat wayward divine entities, both good and evil.
Blasphemous Prayer
3rd-level Order of Heretics feature
You are able to channel divine energies despite your status as a heretic. You gain two Channel Divinity options: Censure the Divine, which is detailed below, and one Channel Divinity of your choice from those available to Cleric Divine Domains at 2nd level. For the second, you use your Blood Hunter level in place of any mentions of Cleric level and your Rite save DC.
You can use each of your Channel Divinities once, and you regain the ability to do so when you finish a long rest.
Censure the Divine
As an action, you utter blasphemies painful to divine entities. Celestials, Fiends, or other creatures capable of divine magic (such as Clerics or Paladins) of your choice within 30 feet of you must succeed a Charisma saving throw against your Rite save DC or be incapacitated and restrained for 1 minute.
Creatures repeat this saving throw at the end of their turns and when they take damage, ending this effect on a success.
Heretical Knowledge
3rd-level Order of Heretics feature
Despite your beliefs, you understand the traditional religious practices, rites, and prayers. You gain the following benefits:

• You gain proficiency in Religion. If already proficient, you add double your proficiency bonus to all Religion checks.
• You learn two Cantrips of your choice from the Cleric spell list. Constitution is your spellcasting modifier.
• If you use Hunter's Bane to analyze a Celestial, Fiend, or Undead, you add one roll of your Rite Die to your ability check.

Unholy Restoration
7th-level Order of Heretics feature
You can draw life from one creature and transfer it to another in a dark mockery of the divine. As an action, you can force a creature you can see within 30 feet to make a Constitution saving throw against your Rite save DC. On a failure, it takes necrotic damage equal to four rolls of your Rite Die, and half as much necrotic damage on a success. It has disadvantage on its saving throw if you touch it as part of this action.
As part of the action, a creature you can see within 30 feet regains hit points equal to half the necrotic damage dealt.
You can use this feature a number of times equal to your Constitution modifier (minimum of once), and you regain all uses when you finish a long rest. When you have no uses left, you can make a Vital Sacrifice to use this feature again.
Divine Anathema
13th-level Order of Heretics feature
When you use Censure the Divine you can empower it with a Blood Curse, forcing creatures of your choice within 30 feet to make on a Constitution saving throw against your Rite save DC, in place of its normal effects. On a failed save, creatures have their speed reduced by 10 feet.
Creatures repeat this saving throw at the end of each of their turns. On a failure, their speed is further reduced by 10 feet, and on a success they regain 10 feet of speed. This effect ends when a creature's speed becomes 0, at which point it is petrified, or when a creature's speed returns to normal.
Celestials and Fiends have disadvantage on saving throws to resist this feature. Once a creature succeeds against this feature it is immune to its effect until the following dawn.
Utmost Transgression
18th-level Order of Heretics feature
You use your occult knowledge to bind denizens of heaven.
As an action, you can cast summon celestial, at 5th-level, using Constitution as its spellcasting modifier. The Celestial is bound against its will by unholy blood magic, allowing you to ignore the material component of the spell, but the duration of the spell is reduced to 1 minute.
Once you cast this spell you must finish a short or long rest before you can cast it this way again.