Arachnidian

You bear many more spider-like qualities than other members of your race. You gain the following benefits: 

• You gain a Bite attack, which you can use to make unarmed strikes. If you hit with them, you deal piercing damage equal to 1d4 + your Dexterity modifier, instead of the bludgeoning damage normal for an unarmed strike. The target must succeed a Constitution saving throw (DC= 8+ proficiency bonus + Dexterity modifier) or be poisoned until the end of their next turn.
• You can cast the spell Web as a Bonus Action, and you can do so a number of times equal to your proficiency bonus, with uses resetting after a long rest. Taking a long rest in your web causes you to gain 5 temporary hit points.