Character Crunch: Changelings

Changelings are the result of a doppelganger-- lazy but cunning monstrous humanoids capable of taking the shape of other humanoids-- and a humanoid having a child. Changelings, often called half-doppelgangers by those that would persecute them, are a race without a culture that simultaneously has no place in society and can perfectly assume any form to fit in.

There are several types of changelings: some changelings refuse to hide their true form and use it primarily, others take on a single persona and disguise as long as they can, others take on any number of convenient identities and it is believed there are isolated communities of changelings who have bonded together and refused to take on any other form.

Changelings can look like anyone at any given time and often prefer to do so. Their true form can be unsettling due to their lack of defined features. With skin ranging from white to grey, with hues of pink or blue, their eyes are large, white, without pupils, and circled by dark rings. Their noses are small and often flat. Their hair is often silver or white, but some have even more exotic hair colors such as pink or blue. Similar to elves, they are slim and lack body hair.

In Sublanarya, changelings face harsh discrimination. Doppelgangers are often exploitative monsters, selfish and unscrupulous, and kill people to take on their forms. With their unusual appearances and abilities, changelings are often forced to hide their true selves and create false identities. Changelings are perfect chameleons and could take on any life without being revealed until death. Their abilities make them apt assassins and thieves but also incomparable actors and performers. Changeling adventurers are as rare as changelings but use their shapeshifting for subterfuge and stealth. They make excellent rogues and bards.

Ability Score Increase. Your Charisma increases by 2, and your Dexterity increases by 1.
Age. Changelings have lifespans equivalent to humans.
Alignment. Changelings are usually neutral, with a tendency towards chaotic nature due to the freedom of being able to become anyone and yet, many changelings have a tendency towards reflecting the alignment of the people they choose to surround themselves with or become.
Size. A changeling's normal form is similar in size and build to a lean human. Your size if medium.
Speed. Your base walking speed is 30 feet.
Dark Vision. 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 grey.
Grey Mind. You have advantage on saving throws against being charmed.
Duplicity. You gain proficiency in the Deception skill.
Shapechanger. As an action, you can polymorph into any humanoid of your size that you have seen, or back into your true form. However, your statistics and your equipment does not change with you. If you die, you revert to your natural appearance.
Mimic. Mimic. Changelings can use their observational skills to make their disguise complete. After observing someone for at least 1 minute, you have advantage on Charisma (Deception) skill checks to imitate that person.
Doppelganger's Trick. You can cast the detect thoughts spell as a level 2 spell. You regain this ability on a long rest. Charisma is your spellcasting ability for this spell.
Languages. You can speak, read, and write Common and two other languages of your choice.