Homebrew Full Blooded Demon Species Details

A demon is a creature of the abyss born from the carnage of twisted mortal souls devouring each other in unending chaos and suffering both received and inflicted.  When a mortal dies unless prevented through unnatural means their soul will be pulled to the boneyard, there they are judged, and for some their lives where full of evil, hatred, betrayal, chaos, and debauchery, and so they are sent to the plane they would turn the material into, the abyss.

Once there these souls devour each other, they live in a haze feeding on those weaker than them and fleeing from those stronger, but over time through processes unknown even to the lords of the abyss the strongest of these souls will gain form and substance beyond a writhing mass of suffering, the form of a demon.  It is unknown whether or not a Demons form is influenced by their actions in their mortal life but regardless they will take a form.

There are many forms of demon all uniquely terrible in their own ways, all living only to inflict pain and suffering on everything and everyone around them for their own pleasure.  There are demons of pure primordial bloodlust and rage who live only for the feeling of rending flesh from bone. 

There are demons of madness who take delight in tormenting minds, they drive madness into all those around them, they often are so deeply twisted themselves that just their mere presence will cause confusion in the feeble minded,  They take the greatest pride and pleasure in twisting a mind so fully wracking it with madness and fear that they lash out, destroying their friends, family, allies, or even just random passersby, all while the demon doesn't need lift a finger, only a thought.

Then there are the "civilized" demons, they see themselves as above primal rage and devouring mortals in unthinking hoards, they care not for driving mortals to the brink of insanity and into an abyss far darker than their own, no they take their delights from corrupting someone, making them do things once unthinkable of their own free will, not just at a request but making them so wholly and truly corrupted that they would sell their own mother or burn down a temple to a god their own grandparents' built housing orphans of war upon their own initiative just to attempt to gain favor with the demon only to be abandoned and left to wallow in the hell of their own making.  These demons unlike the demons of blood and rage who consume the flesh and bone of their enemies, or demons of madness who consume insanity itself, they are above that, they consume the very souls of their victims.  They live in a constant cycle of violence, the only joy they feel is from violence and treachery, and the only connections they have are those of the same.  they can only leech or be leeched from, hurt for the fun of it or be hurt for another's flippant enjoyment.

They mainly reside in the midnight isles, there the largest city in the abyss, Alushinyrra and only recognizable shred of civilization stands, resting in a sea of unfathomable depth and darkness on an island wrought from the flesh and bone of a fallen demon lord, slewn not in battle but by a blade in the knight from the ruler of this abyssal realm.  This is the realm of Nocticual, our lady in shadow, first of the Succubi and queen of the night.  It is her will that Alushinyrra be open to travelers from other plains most often mortals lured by demonic influence or corrupt greed.

As a demon, you may have been brought into the path of good by a deities influence that took an interest in some spark of good they saw in you, or perhaps you realized after years of suffering both inflicted and received of senseless violence and debauchery never a second of rest or a shoulder to lean on have realized that there is more to life than the abyss can offer and you have decided to journey from your realm into the lands of mortals to seek another way of life and perhaps even a chance at redemption to atone for all you have done and set the world right.  Maybe there was a spark of light deep down all along awoken by an influence from Elysium.  Whatever the reason for this change of heart you must stay true to this new path.  Will you march ever onward towards redemption and the promise of a life not in peril and solitude with only false masks of comradery to keep you company, or will you fall back into your old ways and return to the abyss a far darker and more sinister force.

If you go on the path of good you can renounce the abyss and throw off its hold on your soul to have it replaced by the influence of a plane of good, perhaps Elysium or Nirvana, perhaps even the good graces of heaven. 

Full Blooded Demon Traits

A demon has certain traits inherent to them, most demons fall in to a species all of which are unique in their own terrible ways

Ability Score Increase

Your Intelligence score increases by 1, and your Charisma score increases by 2, and your strength, dexterity, or constitution score increases by 1

Age

Demons mature over an unknown period in the pits and holes of the abyss, it may be a season or a millennium no one knows.  Once form is acquired and a new demon born they are ageless.  A demon gains power and knowledge with age but it is always a varied and unpredictable process.  However, most demons can be pinpointed as being equivalent to a certain human or elven life period.  There are brash and overly confident demons in their adolescence, there are those in a stage of life akin to the youth of a human in the prime of their lives.  There are older demons similar to a human in their old age but before they lose their drive.  And then there are the old demons all but over with existence, and then there are those demons who are ancient older than most current demon lords or their realms and these have a knowledge and thought process almost alien to mortals and even most other demons, they have been not just twisted and charred by the abyss but have become the very essence of it.

Regardless of age demons never lose any of their physical ability physically or visually with age, and most gain power as they age though often at the cost of sanity.

Alignment

Demons are creatures born of the abyss and shaped from the ravaged souls of those who lived lives of chaos, debauchery, and violence only caring for their own pleasure and power.

Demons are almost all Chaotic Evil, however, you are different, you're better than that and will likely be either Chaotic Good, Chaotic Neutral, or lawful Good.  Unless of course you really are just a backstabber leeching on the sympathy of the rare breed who would show kindness and perhaps even love for a demon such as yourself.  In this case Chaotic Evil is the best.

Size

Tieflings are about the same size and build as humans. Your size is Medium.

Speed

Your base walking speed is 30 feet.

Darkvision

Thanks to your infernal heritage, you have superior vision in dark and dim conditions. You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can’t discern color in darkness, only shades of gray.

Demonic Resistance

You have resistance to fire damage.  Additionally, you are drawn to warmth and will happily bathe in near-boiling water or sleep next to a furnace.

Abyssal Soul

You know the thaumaturgy cantrip. When you reach 3rd level, you can cast the hellish rebuke spell as a 2nd-level spell once with this trait and regain the ability to do so when you finish a long rest. When you reach 5th level, you can cast the darkness spell once with this trait and regain the ability to do so when you finish a long rest. Charisma is your spellcasting ability for these spells.

Languages

You can speak, read, and write Common and Infernal.