Monstrous Race: Serpentfolk Pureblood

Known also as the Conran (Serpentfolk) Thuanchung (pureblood) to the natives of Dakhla and Sailan. Purebloods/Thuanchung are described as human-like but with minor reptilian features, such as snake-like eyes, a forked tongue, and patches of scales on their skin. Purebloods have weights and heights in the same range as humans. They are high in the hierarchy of the Serpentfolk as many of the Halfbloods and Abominations see them as pure and close to their ideal. Many Purebloods are made, not born, through a blood ritual that takes place in a great religious ceremony. Purebloods are only able to mate with other Purebloods and Humans. However, if they create offspring with normal Humans (especially those of Dragonblood), their child will become a Halfblood (more snake-like features, barely humanoid) or Abominations (almost no humanoid features, mainly giant snakes). The powers of the Jade Emperor doesn't allow them to breed any other way as punishement.
In the Second Age, Godswar, many humans lived south past the Bhutani Mountains in the Godforge Lands. There the Dragons fought great battles on the desert of Suneku and their bodies littered the place in great numbers. The Yugoloth Lord sought this as an opportunity and experimented with humans there, trying to combine them with the dragons. His failed monsters would little the world for millennia to come but one such creation, a wingless Serpentfolk called Anathema was born. Using the draconic blood, this creature became more of a god in the Second Age and gathered a large following of mortals, to which he would bestow many gifts and knowledge. One of which was the blood ritual to create the pureblood Conran, which was a ploy by the Yugoloth Lord to weaken the Jade Emperor. It didn't work as he planed. The Jade Emperor took these servants as his own by force and once the war ended, when the Third Age, Kingdoms dawned the Serpentfolk founded the ancient Dakhla nation, only to become a clients state of the Jadeite Empire. Over the milenia, they would fight for their independence, only succeeding after the Fourth Age, The Calamity.

On Tethys

Most of the Serpentfolk live in Dakhla, seeing these lands as theirs by divine right. There might be some Serpentfolk tribes living elsewhere, probably all ruled by a few Pureblood individuals. While their forked tongues are intriguing, most people treat them with some distrust, even if they have good trade relations with the Djun kingdom as they import large quantities of Black Powder, which once helped them revolt against their masters. 

First World

There are some stories that there existed a race, similar in nature, to the Serpentfolk in the First World far south in ruined lands that were forgotten. There a civilization built on worshipping the sun sacrificed hundreds to become one of the serpentfolk. However, these are legends and can't be confirmed anymore.

Serpentfolk Pureblood

Ability Score Increase Cha +2; Int +1

Size Medium

Speed 30 ft.

---

Age. Purebloods mature at the same rate as humans and have lifespans similar in length to theirs.
Alignment. Purebloods are devoid of emotion and see others as tools to manipulate. They care little for law or chaos and are typically neutral evil.
Size. Purebloods match humans in average size and weight. Your size is Medium.
Darkvision. 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.
Innate Spellcasting. You know the poison spray cantrip. You can cast animal friendship an unlimited number of times with this trait, but you can target only snakes with it. Starting at 3rd level, you can also cast suggestion with this trait. Once you cast it, you can't do so again until you finish a long rest. Charisma is your spellcasting ability for these spells.
Magic Resistance. You have advantage on saving throws against spells and other magical effects.
Poison Immunity. You are immune to poison damage and the poisoned condition.

Languages. You can speak, read, and write Common, Abyssal, and Draconic.