Source: Unearthed Arcana 78 - Draconic Options

Kobolds are often dismissed as cowardly, foolish, and weak, but these little reptilian creatures actually have a strong social structure that stresses devotion to the tribe, are clever with their hands, and viciously work together in order to overcome their physical limitations.

• Ability Score Increase. You increase one ability score of your choice by 2.

• Type. You are a Humanoid.
  
  
• Alignment. Kobolds are fundamentally selfish, making them evil, but their reliance on the strength of their group makes them trend toward law.
  
  
• Age. Kobolds reach adulthood at age 6 and can live up to 120 years but rarely do so.

• Size. You are Small.
  
  
• Languages. You can speak, read, and write Common and Draconic.

• Speed. Your walking speed is 30 feet. You also have a burrowing speed of 10ft.

• 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 discern colors in that darkness only as shades of gray.

• Draconic Legacy. The kobold connection to dragons can manifest in unpredictable ways in an individual kobold. Choose one of the following legacy options when you select this race:
  • You have advantage on saving throws to avoid or end the frightened condition on yourself.
  • You know one cantrip of your choice from the sorcerer spell list. Intelligence, Wisdom, or Charisma is your spellcasting ability for that cantrip (choose when you select this race).
  • You can make unarmed strikes with your tail. When you hit with it, the strike deals 1d6 + your Strength modifier bludgeoning damage, instead of the bludgeoning damage normal for an unarmed strike.

• Draconic Roar. As a bonus action, you let out a draconic roar at your enemies within 10 feet of you. Until the end of your next turn, you and your allies have advantage on attack rolls against any of those enemies who could hear the roar. You can use this trait 2 times and you regain all expended uses when you finish a long rest.