Ratfolk

Mysterious and mischievous, the Ratfolk are, as their namesake suggests, a race of humanoid rat-like people. They are deemed as pests by a wider society, and a brood of ratfolk is seen as nothing more than a gathering of natural pickpockets. Ratfolk can't help their selfish desires, however, as it is believed in their twisted prophecies and skewed histories they were once a favorable people, cursed by the greed of their ancestors, but their lack of written tradition makes this claim weightless.

Now, ratfolk hide underground, taking up residence in sewer systems, abandoned prisons, and ancient catacombs. They emerge to the surface only to plunder, and a merchant with their wits about them may do best to not pass up the sound of the scatter of rat feet as simply that. Because of their selfishness and their natural greed, ratfolk often leave their broods to become adventurers, though only in the broadest sense, as the legends of hidden treasures motivates their will to carry on, even through the toughest conditions.
 * Ability Scores. Dex +2, Int +1, Str -2
 * Size. Small. Ratfolk are between 3 and 4 feet tall, and weigh 40 to 80 pounds.
 * Speed. 30 feet.
 * Age. Ratfolk have rather short lives, reaching maturity in their first year, and living for as long as 20 years.
 * Alignment. All ratfolk are chaotic, but although they are selfish, it never drives them to absolute evil unless there is some darker reward to be gained through it.
 * Darkvision. Accustomed to life underground and in city sewers, you have superior vision in dark and dim conditions. 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.
 * Nimble Escape. You can take the Disengage or Hide action as a bonus action on each of your turns.
 * Underfoot. You can move through the spaces of creatures that are of a size larger than yours, but you can not end your movement in a space occupied by a creature that is Medium or Large.
 * Dagger Expertise. You have proficiency with daggers. When you reach 5th level, your proficiency bonus is doubled whenever you make an attack roll with daggers.
 * Natural Thievery. You have proficiency in the Sleight of Hand and Stealth skills, and you have advantage on rolls made with those skills.
 * Language. You can speak, read, and write Common, and you can speak Ratfolk, a language full of squeaks and chitters that has no written language.

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