Your Constitution score increases by 2, and your Strength score increases by 1.

Driders mature and age at about the same rate as elves.

Driders alignment are entirely dependant on their will to hold their minds during the transformation ritual. If they lose their minds they will descend into madness akin to a Chaotic Evil being, while those that keep their sanity can become lost with no purpose with no particular inclination to any alignment.

Driders stand between 9 and 10 feet tall, with their arachnid bodies reaching about 6 feet at the withers. Your size is Large.

Your base walking speed is 30 feet.

Every creature in D&D, including every player character, has a special tag in the rules that identifies the type of creature they are. Most player characters are of the Humanoid type. A race option presented here tells you what your character’s creature type is.

Your creature type is both Humanoid and Monstrosity.

You have a climbing speed equal to your walking speed. In addition, at 3rd level, you can move up, down, and across vertical surfaces and upside down along ceilings, while leaving your hands free

Your spider lineage allows you to traverse the trapping of your kin. You ignore movement restrictions caused by webbing.

Elvish beings don’t need to sleep. Instead, they meditate deeply, remaining semiconscious, for 4 hours a day. (The Common word for such meditation is “trance.”) While meditating, you can dream after a fashion; such dreams are actually mental exercises that have become reflexive through years of practice. After resting in this way, you gain the same benefit that a human does from 8 hours of sleep.

You have advantage on saving throws against being charmed, and magic can’t put you to sleep.

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

Your fangs, claws, and insectoid legs are all natural melee weapons, which you can use to make unarmed strikes. If you hit with them, you deal slashing damage equal to 1d6 + your Strength modifier, instead of the normal damage for an unarmed strike.

Your darkvision has a radius of 120 feet.