Stranger

I steal people’s identities 

Identity Thief

Your Soul has become unstable. Perhaps you were the victim of some traumatic event, a test subject in an inhumane experiment, or maybe your soul was just born defective. No matter the case, your soul has become malleable and undefined. Given the proper training you can learn to shift both your body and your soul to mimic other creatures

Whenever you land a sneak attack on a creature or size large or less, for the next 24 hours you may use your bonus action to transform into that creature. While transformed you look and sound exactly like the victim. If the Victim is a different size then you, then you become that size while transformed.

While transformed you gain certain benefits depending on the victim you're impersonating. You gain all resistances the victim has and gain any immunities they have as resistances. Additionally, whenever you transform, choose between strength, dexterity, or charisma. If the victim’s chosen stat is higher than yours, then you may choose to have that stat be increased by 2 while impersonating them. And finally, while impersonating a creature you have disadvantage on all saving throws.

 

Fear of Doppelgangers

Whenever the victim you're impersonating starts their turn within 20ft of you, they must make a wisdom saving throw(DC= 8+prof+Cha). On a fail they become frightened of you until the start of their next turn. Additionally, you deal an additional 2d6 psychic damage to victims you're impersonating.

 

It Remembers Faces

Whenever you transform into a creature, you may choose to make that form into a “Core Identity”. Core Identities are forms that you may turn into regardless if you sneak attacked them in the last 24 hours. While transformed into a Core Identity you gain all proficiency and expertise with all skills they have proficiency and expertise in. 

You can only have up to 3 Core Identities. If you choose to gain another Core Identity while you already have 3, choose one to be replaced.

 

Copy Soul

You have learned not only to copy the physical attributes of a creature but have also learned to copy their power as well. While you are impersonating a creature you may choose one action/bonus action/reaction the victim has. This action cannot do damage and cannot require a specific magic item to work. Until you stop impersonating this creature you may use that action using your ability scores if it requires any. If the victim can only use this ability a limited number of times a day, you must also follow that limit. 

You may use a copied action a number of times equal to your Charisma modifier. Afterwards, you cannot use a copied action until you finish a long rest.

 

Identity Crisis

Whenever a creature fails your Fear of Doppelgangers saving throw, they become paralyzed instead of frightened. Additionally, you deal an additional 2d12 psychic damage instead of 2d6.

 

Assimilate

While impersonating a creature you no longer gain disadvantage on saving throws and instead gain any saving throw proficiencies they have. Additionally, you gain the creature types, senses, and movement speeds of any creature you're impersonating. 

 

Replacement

Whenever you hit a sneak attack on a victim you are impersonating, that attack automatically crits.