Your life in the Underdark has given you sharp eyes so you can see in the dark. You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. you cant see colour in darkness only grey and black.

Due to the natural poisons in your skin and blood you are imunte to beeing poisoned and poison damage.

Due to your aperance you can intimidate people easily and due to your life in the underdark as a walking failiure you no longer feel fear so you have both advantage on Intimidation checks and an imunity to beeing frightened.

Your Size is Medium.

You are a Fey.

Your walking speed is 40 feet.

Due to your curse you can climb walls while not wearing heavy armour, you have a climbing speed of 30 feet, you are however to heavy to climb upside down on the ceiling. You are also imune to the web effect, and webs does not count as difficult terrain for you.

You have proficiency with rapiers, shortswords, and hand crossbows.

When you make an unarmed strike you use your spider legs. When you hit with them the strike deals 1d8 + your dexterity modifier poison damage instead of the usual damage when usinmg unarmed strikes. 

You can also coat your weappons and arrows in your natural poison making them deal and extra 1d4 damage on melee weapons and 1d6 on ranged  weapons. You can coat your weawpons as many times as your constitution modifier with a minimum of 1.

Due to your time spent in the underdark you have learned to camouflage so you have proficiency in the Stealth skill.