Driders are cursed creatures and as such to amplify the suffering of these twisted individuals they live roughly twice as long as humans (about 200 years).

Driders tend toward evil as Lolth simply prefers evil people as followers.

The bottom half of a drider being a giant spider has given the driders an extra 3 feet taller than humans (up to 9 feet total). Your size is large.

Driders are fluent in Common, Elvish, Undercommon and Abyssal. 

Driders gain +2 to dexterity and +1 to strength

Driders commonly live in the Underdark and the feydark and as such have evolved darkvision up to 60 feet.

Driders can cast dancing lights (at will) and faerie fire (1/day) when you reach first level and darkness when you reach third level (1/day) without components. These become at will at sixth level.

Driders ignore movement restrictions induced by webbing and are immune to the "Web" spell.

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

Blessings from Lolth have given the driders immunity to magical sleep and advantage on saving throws against being charmed.

The spider portion of a Drider's body gives any Drider the ability to climb the vast majority of surfaces and cling onto them indefinitely (including on ceilings) with no ability check.

As a way of entering and leaving the Underdark Driders can dig at half of their normal speed. This cannot be used when wearing heavy armour.

While burrowing, Driders have a highly developed sense with a reach of 20 feet to find prey that is on the surface.