Increase one ability score by 2, and increase a different one by 1.

Your creature type is monstrosity

Although Driders are on the bigger end, some of them can be quite small. Your size is either Medium or Small.

Your walking speed is 30 feet

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

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 are immune to the prone condition unless you are either willingly prone or are unconscious.

You can speak, read, and write common and undercommon 

Starting at 5th level, you can use your bonus action to tap into some inherent energy, shifting into the ethereal plane. For the next minute, you can spend a bonus action on subsequent turns to shift between the material and ethereal planes. If you are in the ethereal plane when the minute is up, you are forcibly shifted to the material plane.

Once you use this ability, you cannot do so again until you complete a long rest