Your Dexterity score increases by 2, and your Constitution score increases by 1.

Young Ratfolk grow and mature quickly, reaching adulthood after only 1 year. Generally, Ratfolk have short lifespans living to be around 30 years of age. Some Ratfolk have been known to live much longer however, usually through magical means.

Most Ratfolk are lawful evil in nature, willing to do anything for the group's benefit while following their clan's rules and law. Ratfolk who have left their clan or have grown up outside of the influence of normal Ratfolk culture may lean towards any alignment.

Ratfolk range from 6 to 7 feet tall. Ratfolk range from fairly slender in built to fairly bulky. Your size is Medium.

Your base walking speed is 30 feet.

You have a burrowing speed equal to half your speed. You can only burrow through loose dirt or loose rock such as gravel. You cannot burrow if you are carrying or wielding anything in your hands.

Accustomed to living in deep burrows and tunnel underneath the ground, Ratfolk have adapted to have superior vision in dark and dim conditions. You can see in dim light within 60 feet of you as it were bright light, and in darkness as if it were dim light. You can't discern color in darkness, only shades of gray.

You have advantage on Wisdom (Perception) checks that rely on smell.

Due to the nature of the harsh conditions Ratfolk have endured over many generations, you have resistance to poison damage. Additionally, you have advantage on Constitution saving throws against disease and infection. 

Your speak Common, Undercommon, and Ratfolk. Ratfolk is a hasty language made up of chittering and clacking. Be sure to add the Ratfolk language to your character sheet manually.