Living in the Underdark for generations, 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 disadvantage on attack rolls and Wisdom (Perception) checks when you, the target of your attack, or whatever you are trying to perceive is in direct sunlight.

You have proficiency with war pick, javelin, scimitar, and hand crossbow.

The duergar have advantage on saving throws against poison, as well as to resist being Charmed or Paralyzed.

You have proficiency in the Perception skill.

You know the Dancing Lights cantrip and can cast it at will. At 3rd level you can cast Invisibility, and at 5th level you can cast Enlarge, but only on yourself. These spells are cast at 2nd level, and cannot be cast at any higher level with this trait. Once you cast a spell with this trait, you can’t cast that spell with it again until you finish a long rest.

Your Constitution and Dexterity scores increases by 2, and your choice of Intelligence or Charisma increases by 1. Strength also increases by 1.

Taking from both their parents, a Drow/Dwarf can live to be 550, but maturing at around 75.

Most dwarves are lawful, believing firmly in the benefits of a well-ordered society. They tend toward good as well, with a strong sense of fair play and a belief that everyone deserves to share in the benefits of a just order.

Draws stand between 4 and 5 feet tall and average about 150 pounds. Your size is Medium.

Your base walking speed is 30 feet. Your speed is not reduced by wearing heavy armor.

You can speak, read, and write Common, Dwarvish, and Undercommon. Dwarvish is full of hard consonants and guttural sounds, and those characteristics spill over into whatever other languages a dwarf might speak.