Your Wisdom score increases by 2. When born into a colony, the unending internal and uncommon external discourse causes Dvati to become masters of their own mind. However, when exposed to the raucous and multicultural outside world, the attention their identical form draws often provokes a behavioural transition to a joyous and joking pair. You may choose between an Intelligence or Charisma score increase of 1 to reflect your upbringing.

Dvati age slowly compared to most other humanoids, not reaching adulthood until they are around 40 years Old. A Dvati younger than 40 may appear like a teenager or child. They have long lifespans, living for up to 250 years.

Dvati view the world through a balanced lens. They are almost exclusively neutral, with the small remainder leaning towards lawfulness.

The Dvati are a short and slight people. Your size is small.

Your base walking speed is 25 feet.

Twins can move, speak, and act independently of each other. Each twin has their own movement speed. If a twin takes the dash action, you may split the extra movement speed between them. Though twins are capable of independence, they favour shared tasks and movement. For each additional 100ft after 50ft of separation, add one level of exhaustion to your twins.

HANDLING TWO ADVENTURERS

The Dvati race puts two characters into the hands of one player. Keep in mind, Dvati twins should be treated as one creature unless a specific racial feature says otherwise. They share their Statistics, Skills, turn in Initiative, Actions, and Class Abilities. Hit Die and Hit Points are not divided between twins, they share those resource as one creature. Twins use separate equipment like weapons and armour. They may even use separate magic items, but they share attunement slots.

Actions: You choose which one of them takes an action, bonus action, or reaction. If you gain any additional actions, you may split those actions up between them. Only one action can between the two can be a spell.

Spellcasting: Your twins share their spell slots and can only focus on one concentration spell at a time, however only one twin needs to focus to maintain it. When casting a concentration spell you may choose which twin is focusing on it. When casting a spell, either Dvati can provide the spell components, and the spell can originate from the twin of your choice.

Due to the two bodies the Dvati twins inhabit, when required each affected twin must make a separate Strength, Dexterity, and Constitution saving throw. Conversely, due to the inextricably linked nature of their soul, Dvati twins make a singular Charisma, Intelligence, and Wisdom saving throw that affects both bodies.

When defending an attack, the attacker need only roll once to hit, regardless of whether both twins are affected. On a successful hit, divide the damage equally among the affected twins and apply the attack's effects to each twin. To end the attack, coalesce the damage and apply it to the pooled Hit Points of the Dvati twins.

Nonmagical sensory effects affecting one twin impact the non-affected twin's ability to fight. While a twin is Blinded, Deafened, Incapacitated, Paralyzed, Petrified, Poisoned, Restrained, or Stunned, the other attacks with Disadvantage.

For example;

Fireball (Dexterity saving throw) (Both twins targeted)

Fireball (Dexterity saving throw) (One twin targeted)

Telekinesis (Strength saving throw) (Twin 1 targeted)

While twins are on the same plane of existence, they incur the following effects.

• Twins have advantage on saving throws against effects that would cause them to become Charmed, Frightened, or Unconscious. If a twin becomes Charmed, Frightened, or Unconscious, the other twin is affected as well.
• In the case of magical buffs and debuffs, the Dvati twins count as one creature. For example; if a Dispel Magic or Enhance Ability spell are cast upon one twin, or if a twin is affected by a magical trap or an area of antimagic, the other twin is also affected.
• Whenever a twin casts a spell that requires concentration, the other twin must also concentrate on that same spell. If a twin casts a spell that requires material components, the other twin can provide those components for them.

Your twins have a common pool of Hit Points. When one twin takes damage or is healed, that amount is taken or added to the pool. If the common Hit Point pool reaches 0, both twins fall Unconscious, but proceed to make death saving throws independently. If one twin is stabilized, the other is also stabilized.

If a twin dies, the surviving twin loses their racial traits unique to their dual nature until the deceased twin is returned to life. After each long rest thereafter, the surviving twin must succeed on a DC 15 Constitution saving throw or suffer one level of Exhaustion. These Exhaustion levels cannot be removed by anything except for a Wish spell or until the deceased twin is returned to life, at which point all Exhaustion levels are immediately lost.

Most Dvati prefer to commit ritual suicide if one twin dies without hope of return, as the pain of losing the close bond drives a Dvati to the brink of madness. 

When a Dvati twin attempts a Deception check to impersonate their other, they are considered Proficient even if they don't possess Proficiency in the Deception skill, and they gain Advantage on the check.

You can speak, read, and write Common. You can also speak Dvati, which has no written language. Dvati is impossible to speak without a twin, as the polyphonic contour of Dvati's dual-voice speech conveys emotion, meaning, and intent. While Dvati twins predominantly use Common to communicate with other races, the habit of speaking together as one is difficult to break and functions as a thick and highly off-putting accent.