Naga

Naga resemble enormous snakes with shoulders, arms, and a torso that resembles a humanoid form. They typically hold their heads and torsos off the ground while moving, but they can increase their speed by lowering their bodies and using their hands for extra propulsion. They adorn their torsos with armor, jewelry, and a vague nod toward the clothing worn by other races. Male naga have broad hoods, wider than their shoulders, while females have narrower hoods and longer faces.

Creating a Naga

Ability Score Increase. Your Constitution score increases by 2, and your Intelligence score increases by 1.
Creature Type. You are a Monstrosity.
Age. Like humans, naga reach adulthood in their late teens. They show no signs of aging beyond that point except for growing larger, so in theory, a naga could live well over a century.
Alignment. Most naga are either neutral or neutral evil in alignment.
Size. Naga stand about 5 feet tall when upright, but the total length of their bodies, head to tail, ranges from 10 to as much as 20 feet. Your size is Medium.
Speed. Your base walking speed is 30 feet.
Speed Burst. By lowering your body to the ground and propelling yourself with your arms, you can move more quickly for a time. As a bonus action on your turn, if you have both hands free, you can increase your walking speed by 5 feet until the end of your turn.
Natural Weapons. Your fanged maw and constricting serpentine body are natural weapons, which you can use to make unarmed strikes. If you hit with your bite, you deal piercing damage equal to 1d4 + your Strength modifier, and your target must make a Constitution saving throw (DC 8 + your proficiency bonus + your Constitution modifier). On a failed save, the target takes 1d4 poison damage.

• If you hit with your constrict attack, you deal bludgeoning damage equal to 1d6 + your Strength modifier, and the target is grappled (escape DC 8 + your proficiency bonus + your Strength modifier). Until this grapple ends, the target is restrained, and you can’t constrict another target.
  

Poison Immunity. You are immune to poison damage and can’t be poisoned.
Poison Affinity. You gain proficiency with the poisoner’s kit.
Languages. You can speak, read, and write Common and Naga.

Source: Plane Shift - Amonkhet

Racial Options

There are a few options to make your character fit the ideas you may have. The Ability Score Increase, Size, and even Languages can all be customized to better fit your character's history. Maybe you come from a very hardy people, like the Dwarves, but your character can't handle even the slightest cold breeze, but they make up for it with their incredible intellect. You could have been born of the tall and long Elves, but you find yourself barely coming up to some of their hips. Your Goblin may have been adopted by a couple of loving Genasi and they taught you to speak Primordial instead of Goblin. The options listed under your chosen race are just suggestions to easily fit your character within their culture's society, but you can change things up to make your character truly yours. There may be limitations set by the DM; rarely will you find a Large Fairy or a Tiny Goliath, but if you have a good story-driven reason for different character options, anything can be possible. Below are open-ended options for customizing your race.
Ability Score Increase. Increase one ability score by 2, and increase a different one by 1.
Size. Your size is within one size option of your race's average size.
Languages. You can speak, read, and write Common and one other language that you and your DM agree is appropriate for the character.

Choosing a Class

Artificer
Barbarian
Bard
Cleric
Druid
Fighter
Monk
Paladin
Ranger
Rogue
Sorcerer
Warlock
Wizard