Your wisdom increases by 2 and two ability scores of your choice increase by 1

Dvati mature at the same rate as humans but tend to live twice as long

Humans tend toward no particular alignment.

Like humans, Dvati varies in height and build, but tend to be between 5 and 6 feet tall. Regardless of your position in that range, your size is Medium.

Your base walking speed is 30 feet.

From a distance Dvati look seemingly like identical twin humans, but upon closer inspection it becomes clear that they are far from it. A Dvati will have solid glimmering eyes with no pupil or iris. Their eyes will usually be blue but can come in other colours, and some Dvati believes these are the colour of their shared soul. Their skin is snow-white, and hair is solid black. Their noses are extremely slight, and in most cases are nothing more than slits that barely protrude from their faces.  They have three fingers and opposable thumbs. Most humanoids find a dvati's appearance—particularly their unwavering eyes— slightly unnerving. Dvati are acutely aware of this, and many of them wear hooded cloaks around strangers.

Dvati adventurers are rare, as most of them prefer simple lives of contemplation, honest work, and fellowship. Sometimes a dvati feels a deep sense of wanderlust. Bored with the often repetitive existence of their colonies and settlements, young dvati strike out in search of new adventures. Some of these dvati are fascinated by other folk and wish to learn more about them. Others study philosophies that require the dvati to seek out new experiences. Dvati rarely adventure for material wealth or accolades, as such things have little value to a dvati aside from their pragmatic uses.

You and your twin make separate death saving throws. If one of you become stabilized, both of you become stabilized. If your twin dies, you lose your shared traits until your deceased twin is returned to life. After each long rest thereafter, you must succeed on a DC 15 Constitution saving throw or suffer one level of exhaustion. These exhaustion levels can not be removed by anything except a Wish spell or until your deceased twin is returned to life, at which point all exhaustion levels are immediately removed. 

Actions Each twin has their own action, but share their bonus action and reaction. Only one action can between the two can be a spell.

Attack Both twins can use their main action to attack, but only one can use their bonus action. Should you take a class that gains extra attacks, one twin may use that extra attack.

Spellcasting The 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 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.

Class Abilities The twins share any class ability slots and are treated as one creature where effects are concerned.

Magical Effects  If a spell or magical ability affects one dvati twin, such as charmed, it affects them both, unless that spell or ability affects hit points or if the two twins are further than 100 feet apart, in which case, it affects each twin separately.

Conditions A condition, such as being poisoned or grappled, affects only one twin, even if imposed by a spell.

Hit Points Due to their unique connection, the twins share the same pool of hitpoints and together have the same number of hit points as one human of the same class. If one is hurt, the other feels his twin pain but only takes damage once.

Armour Either twin has his own AC

Death Should they drop to 0 hit points, whichever twin took the killing blow will be placed into the down state. However the other twin will remain up with 1 hit point. If the downed twin is finished off or fails his death saves, the remaining twin will die in 3 (1d6) days unless his brother is restored to life.

As long as both twins are on the same plane, they can send messages to each other telepathically and can empathetically sense the other's emotional state. Each twin knows when the other takes damage. They also have a general sense of the direction that the other twin is in if they are separated. 

Dvati twins can communicate with each other using half the words and twice the speed of other creatures, even in combat.

You gain proficiency in the Perception skill.