Homebrew Doppelganger Species Details

Doppelgangers are devious shapeshifters that take on the appearance of other humanoids, throwing off pursuit or luring victims to their doom with misdirection and disguise. Few creatures spread fear, suspicion, and deceit better than doppelgangers. Found in every land and culture, they can take on the guise of any individual of any race.

Stealing Secrets. A doppelganger’s adopted form allows it to blend into almost any group or community, but its transformation doesn’t impart languages, mannerisms, memory, or personality. Doppelgangers often follow or capture creatures they intend to impersonate, studying them and probing their minds for secrets. A doppelganger can read a creature’s surface thoughts, allowing it to glean that creature’s name, desires, and fears, along with a few scattered memories. A doppelganger impersonating a specific creature as part of a long-term plot might keep its double alive and close at hand for weeks, probing the victim’s mind daily to learn how to behave and speak authentically.

Hedonistic Swindlers. Doppelgangers work alone or in small groups, with group roles shifting from con to con. While one doppelganger takes the place of a murdered merchant or noble, the others take on a number of identities as circumstances warrant, playing the parts of family or servants while they live off the victim’s riches.

Changelings. Doppelgangers are too lazy or self-interested to raise their young. They assume attractive male forms and seduce women, leaving them to raise their progeny. A doppelganger child appears to be a normal member of its mother’s species until it reaches adolescence, at which point it discovers its true nature and is driven to seek out its kind to join them.

Creating Your Character

Ability Score Increases

When determining your character’s ability scores, increase one score by 2 and increase a different score by 1, or increase three different scores by 1. Follow this rule regardless of the method you use to determine the scores, such as rolling or point buy. The “Quick Build” section for your character’s class offers suggestions on which scores to increase. You can follow those suggestions or ignore them, but you can’t raise any of your scores above 20.

Languages

Your character can speak, read, and write Common and two other languages that you and your DM agree is appropriate for the character. The Player’s Handbook offers a list of languages to choose from. The DM is free to modify that list for a campaign.

Creature Type

You are a Monstrosity.

Life Span

You reach the age of maturity around 20 years of age, and live for about a century.

Height and Weight

You typically fall into the same ranges of height and weight that humans have in our world. If you’d like to determine your character’s height or weight randomly, consult the Random Height and Weight table in the Player’s Handbook, and choose the row in the table that best represents the build you imagine for your character.

Doppelganger Traits

As a doppelganger, you have the following racial traits.

Creature Type

You are a Monstrosity.

Size

You are Medium or Small. You choose the size when you select this race.

Speed

Your walking speed is 30 feet.

Darkvision

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 gray.

Shapechanger

As an action, you can change your appearance and your voice. You determine the specifics of the changes, including your coloration, hair length, and sex. You can also adjust your height and weight and can change your size between Medium and Small. You can make yourself appear as a member of another race, though none of your game statistics change. You can’t duplicate the appearance of an individual you’ve never seen, and you must adopt a form that has the same basic arrangement of limbs that you have. Your clothing and equipment aren’t changed by this trait.

You stay in the new form until you use an action to revert to your true form or until you die.

Read Thoughts

You can magically read the surface thoughts of one creature within 60 feet of it. The effect can penetrate barriers, but 3 feet of wood or dirt, 2 feet of stone, 2 inches of metal, or a thin sheet of lead blocks it. While the target is in range, you can continue reading its thoughts, as long as your concentration isn't broken (as if concentrating on a spell). 

Probed Mind

While reading a target's mind with Read Thoughts or detect thoughts, you have advantage on Wisdom (Insight) and Charisma (Deception, Intimidation, and Persuasion) checks against the target.

Alien

You have advantage on saving throws against being charmed.

Ambusher

You have advantage on attack rolls against any creature you have surprised. If you surprised a creature and hit it with an attack during the first round of combat, the target takes an extra 2d6 damage from the attack.

Imposter

You gain proficiency in Deception. Doppelgangers are masters of deceit and subterfuge.