Homebrew Arch-Devil Species Details

Arch-Devils are part of the upper echelon of the lower plane of Hell. They hold dominion of a specific level of Hell, as they are blessed and imbued with the primordial god of the lower planes's power to an unparalleled degree, untouchable in power by any other beings within Hell. Each arch-devil is one of the nine overlords of Hell, each with their own "level" within the hellish plane. The levels of Hell descend in stature and power, with the lowest level being the 9th level in which the greatest evils lie in service of the oldest arch-devil of the nine. 

Each arch-devil holds dominion over each of the mortal sins in accordance with the primordial creation of the universe and of the plane of Hell. 

1st Pit of Hell: Gluttony

2nd Pit of Hell: Blasphemy

3rd Pit of Hell: Envy

4th Pit of Hell: Sloth

5th Pit of Hell: Greed

6th Pit of Hell: Lust

7th Pit of Hell: Pride

8th Pit of Hell: Despair

9th Pit of Hell: Wrath

Infernal Prominence

As one of the nine overlords of Hell, you command an aura of authority unmatched within your respective level within the plane. This aura is still slightly respected in other levels as you are still higher up than those who dwell within them, and the other overlords are all bonded together as they were the original devils blessed with the power of the primordial force of Hell. 

Flames of Doom

The nine arch-devils are beings birthed from the primordial force of flames, granting them immunity to fire damage and the ability to doom enemies to experience a taste of what awaits them in hell. None can summon flames to control within the vicinity of an arch-devil as they have dominion over any source of fire no matter the origin, being that of nature or of a spell. 

Boon of Hell

Arch-devils may impart a boon from hell unto those willing to sacrifice whatever the arch-devil prompts to be the source of sacrifice. This boon may take many forms, whichever the arch-devil agrees upon, some examples include mass healing, immunity to a certain damage type, patronage (combines multiple requests for the price of the requester's eternal soul), magic item, general power, etc. 

Arch-Devil Traits

Arch-Devils share most traits with each other, but the respective domain levels amplify the traits the lower the number with 9 being the lowest level.

Infernal Dominion

As you are one of the nine original devils that are the overlords of the plane of Hell, you can command all the denizens that exist within your respective level of dominion within Hell. So as a reaction on any turn you take, you may summon 1 D8 of a type of creature decided by a D100 roll, these creatures specifically are from your realm of dominion.

---

Roll on D100	Type of Creatures Summoned
0-25	Squadron of Lv. 15 Fiendish Barbarians (5 to a squadron)
26-50	Your choice of 2 of your infernal children (D8 roll doesn't imply to this roll of selection, as the number summoned is already determined)
51-75	A giant ancient fiendish dragon (CR=25) that obeys only you and can never be turned against you and those you deem worthy
76-100	Battalion of Lv. 15 Paladins of Your Patronage (20 to a battalion)

Size

Standing at 9 feet tall while in your material form, you also have a wing span twice the size of your height. But keep note that when you are within the plane of Hell, you can choose to assume your true form which is of Gargantuan size and build as you erupt into a column of fiendish flame revealing you to be towering at 100 feet with pure hellish malevolence emanating off you in your true form as you exist without restraint within your absolute domain in the plane of Hell.  

Flames of Doom

Being derived from the primordial force of flames and fire, you are immune to fire. Therefore your stature also allows you to use your reaction to doom any enemy who attacked you and have them be wrapped in a coil of hellish fire. You use your reaction to ensnare any enemy that attacked you within the last two turns to be wrapped up in a torrent of flames you summon from your dominion within the plane of Hell. Give your enemies a taste of what awaits them in the afterlife once you kill them.

Boon of Hell

As an arch-devil there is extremely little you can not do for the right price. Therefore you may decide a price, ranging from something trivial to the eternal soul of the being making the request of your generosity. There is no limit to the type of boon you may grant but you can only grant one boon per long rest.

Speed

You have a base speed in all categories of 100 ft.

Level of Hell

You take upon the mantle of the corresponding sin with your designated domain. You embody the sin, in which your power becomes attuned to it. You may make the designation with your DM in how the sin may boost your power and abilities, have fun with this RP open power bonus.

Ability Score Increase

Add +10 to STR, DEX, CON, INT, AND WIS.
Add +15 to CHA.