When you make a Dexterity (Stealth) check, you can make the check with advantage. You can use this feature a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest. 

Starting at 3rd level, you can cast the disguise self spell spell with this trait. Starting at 5th level, you can also cast the nondetection spell with it, without requiring a material component. Once you cast either of these spells with this trait, you can't cast that spell with it again until you finish a long rest. You can also cast these spells using spell slots you have of the appropriate level. 

Intelligence, Wisdom, or Charisma is your spellcasting ability for these spells when you use this trait (You choose when you select this rate). 

One ability score of your choice increases by 2, and another ability of your choice increases by 1. 

Gnomes mature at the same rate humans do, and most are expected to settle down into an adult life by around age 40. They can live 350 to almost 500 years.

Gnomes are between 3 and 4 feet tall and average about 40 pounds. Your size is Small.

Your base walking speed is 30 feet.

Accustomed to life underground, you have superior vision in dark and dim conditions. You can see in dim light within 120 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.

You have advantage on all Intelligence, Wisdom, and Charisma saving throws against spells.

You can speak, read, and write Common, Gnomish, and Undercommon. The Gnomish language, which uses the Dwarvish script, is renowned for its technical treatises and its catalogs of knowledge about the natural world.