All Derro suffer from the insanity of the Far Realm giving them an advantage when resiting charm or frighten effects.

Your Dexterity score increases by 2 and Intelligence by 1.

A Derro reaches adulthood at the age of 20 and generally lives into the middle of his or her second century.

Most Derro are insane so lean towards multiple alignments. Your average Derro however is typically chaotic and prone towards evil.

Halflings average about 3 feet tall and weigh about 40 pounds. Your size is Small.

Your base walking speed is 30 feet.

The derro has advantage on saving throws against spells and other magical effects.

While in sunlight, the derro has disadvantage on attack rolls, as well as on Wisdom (Perception) checks that rely on sight.

You gain proficiency in the stealth skill.

You can speak, read, and write Undercommon and Dwarvish.