Kobold

“The dragon scale toughens our skin.
The dragon bone adorns our skull.
The dragon heart flames our sorcery.
We are the dragon, and for the dragon we live.
Long live the dragon.”
— A common kobold saying

Kobolds are aggressive, insular, yet industrious small humanoid creatures, noted for their skill at building traps and preparing ambushes, and mining. 
They were created by dragons a long time ago and now serve them as loyal minions. To see one is to know a dragon has its hands in the mix, as really these creatures where never made to live apart from their makers and naturally gravitate to the dragon's charisma and guidance. 

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Appearance

Kobold are reptilian humanoids, with scaled skin between reddish brown and black in color and burnt orange to red eyes. Their legs are sinewy and digitigrade. They have long, clawed fingers and a jaw like a crocodile. Small white or tan horns protruded from their head, and they have rat-like tails. They also often smell of wet dog and stagnant water, and like to wear red or orange garments, which were usually ragged.

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Racial abilities

 

Ability Score Increase. Your Dexterity score increases by 2.
Speed. Your base 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.
Grovel, Cower, and Beg. As an action on your turn, you can cower pathetically to distract nearby foes. Until the end of your next turn, your allies gain advantage on attack rolls against enemies within 10 feet of you that can see you. Once you use this trait, you can't use it again until you finish a short or long rest.
Pack Tactics. You have advantage on an attack roll against a creature if at least one of your allies is within 5 feet of the creature and the ally isn't incapacitated.
Sunlight Sensitivity. You have disadvantage on attack rolls and on Wisdom (Perception) checks that rely on sight when you, the target of your attack, or whatever you are trying to perceive is in direct sunlight.
Languages. You can speak, read, and write Common and Draconic.

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DM Advice

If you are interested in playing a character of this race, there are a few very specific ways i could build you into the story. Though they include some secrets, and as such would need to be discussed privately.  

Lifespan

Kobolds reach adulthood at age 6 and can live up to 120 years but rarely do so.

Average Height

Kobolds are between 2 and 3 feet / 60cm – 75cm tall. Your size is Small.

Average Weight

They weigh between 25 and 35 pounds. (16 – 20kg)