Life in the underdark has made Driders overly sensitive to sunlight. 

Disadvantage on Perception checks and attack rolls reliant on sight in direct sunlight.

Having the body of a spider, Driver's can climb on vertical surfaces and ceilings unhindered.

As an action, use spider fangs/mandibles to bite your foe.

To hit: STR mod + Prof. bonus

Range: 5'

1d4 + STR mod piercing dmg

1d4 poison damage, Con save to half damage (DC= 8 + Prof bonus + spell mod [DM choice for mixed/non-caster])

d4s increase with level to d8 (6th level), d10 (12th level), and 2d8 (17th level)

*DM decides if this counts as attack action for the purposes of attacks of opportunity and extra attack.

+1 to two ability scores.

Although elves reach physical maturity at about the same age as humans, the elven understanding of adulthood goes beyond physical growth to encompass worldly experience. An elf typically claims adulthood and an adult name around the age of 100 and can live to be 750 years old. Driders age like elves.

Elves range from under 5 to over 6 feet tall and have slender builds. Your size is Medium.

Your base walking speed is 35 feet.

Accustomed to twilit forests and the night sky, 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 proficiency in the Perception skill.

You can speak, read, and write Common and Elvish.