Changelings are a humanoid race who are distantly descended from doppelgangers and share their shapeshifting qualities. Their shapeshifting has led to them being used as spies and assassins, which has, in turn, led to them being mistrusted amongst the people of Khorvaire.
Changeling Appearance
Their true skin is usually grey or pale white, and their facial features are blank slates to an unnerving degree.
A changeling, also historically referred to as an auf or oaf, is a human-like creature found in folklore throughout Europe. A changeling was believed to be a fairy that had been left in place of a human (typically a child) stolen by other fairies.
The Changeling DnD 5e race is such a malleable character that even their DnD backgrounds have variations.
Most changelings don't know they're changelings.
Though they may always feel somewhat different or removed from human life, most changelings are too young to understand who they truly are.
Changelings cannot alter themselves enough to change physical sizes (i.e, changing from Medium to Small, etc). It is worth noting that while a changeling could technically shift into something like an aarakocra, their wings would be non-functional.
Changeling blood is green, unlike most other animals. Changelings, despite their thinly and seemingly fragile frame, are capable of surviving otherwise fatal injuries thanks to their magical abilities.
Unlike doppelgangers, which are entirely genderless, a changeling does have a default gender that manifests in adolescence, but each changeling can adapt his or her form to be of either gender, hermaphroditic (both genders simultaneously), or entirely genderless.
Similar to elves, changelings lack body and facial hair. However, most changelings are rarely seen in their true form and prefer to adopt all kinds of humanoid shapes, treating their appearance like others treat clothes. This includes gender.
Appearance. In their true form, or their form "at rest", changelings have pale skin, colorless eyes that can be completely white or completely black, and white or silver-white hair.
The short version is that a Changeling can shapeshift to a form that can produce sperm to impregnate someone, and can shapeshift to a form with a uterus and eggs to get pregnant, but a pregnant Changeling cannot shapechange to a form without a uterus without ending the pregnancy.
Changelings are thought to be an uncommon race—though their true demographics remain unknown, as may live their entire lives masking as other sentient races. Many places in the world fear changelings for their unique ability to assume the form, or 'profile', of nearly any person, indefinitely.
Age: Changelings reach adulthood at the age of 16. Their fey heritage allows them to live much longer than humans, up to 200 years.
Changelings are humanoid creatures with discolored, slimy skin, hollow eyes, and a round mouth with many teeth. They can appear human, but their true nature is revealed in their reflection.
Changelings are born into one of two paths. They may be born to two changeling parents, and raised with full understanding and acceptance of their nature from birth. Or they may be born to a mixed parentage, in which case they are often taught to conceal their true nature.
Appearance. In their true form, changelings are generally extremely pale, showing features devoid of distinctive details, with colorless eyes and silver-white hair.
As for being tattooed, changelings can definitely be tattooed, and they can just as easily erase the tattoo with a moment's thought.
In their natural forms, changelings average between 5 and 6 feet in height, with a slender build.
Changelings typically have large eyes with narrow pupils, ranging in color from white, to yellow, to black. Hair colors are similar: Light grey, platinum blonde, shades of silver, all the way to the darkest hair color being a light brown.
DS9: "Chimera" suggests Changelings have a lifespan of at least two hundred years, although if Odo was indeed two hundred years old when he traveled back with the USS Defiant in an alternate timeline in DS9: "Children of Time", that would indicate Changelings could live for at least four hundred years.
Changeling 5E FAQ
a changeling can turn into a humanoid of similar size. That means while you cannot change from medium to small, you could take the form of a wide range of other races or even individuals. It goes without saying that the possibilities are endless.
Most often, the mother begins to carry twins, and one of the twins is a changeling. There are extremely rare cases of being born alone, or as part of triplets. In the rarest of cases, the other twin is a hag.
Blue Blood is a deep, neutral, Caribbean aqua with a turquoise undertone.
Some types of octopus, squid, and crustaceans have blue blood. Their blood contains a high concentration of copper. When copper mixes with oxygen, it gives their blood its blue color. Blue and red are not the only possible colors of blood — some animals bleed green.
Color. The color of human blood ranges from bright red when oxygenated to a darker red when deoxygenated.