Your physical similarities to arachnids manifest in an ability to inject a corrosive venom into your prey. As an Action, you sink your fangs into a target within reach that must make a Constitution saving throw. The DC for this saving throw equals 8 + your Constitution modifier + your Proficiency Bonus. A creature takes 2d6 Acid damage on a failed save, and half as much damage on a successful one. The damage increases to 3d6 at 6th level, 4d6 at 11th level, and 5d6 at 16th level. You can use this ability a number of times equal to your Constitution modifier and you regain all uses of this ability after a Long Rest.

Your Dexterity score increases by 2 and your Constitution score increases by 1.

Driderlings reach maturity by their 16th year of life. Afterwards, they age more slowly and can live for up to 600 years.

Driderlings have long since broken from the preference for cruelty and evil that their Drider ancestors are born with. However due to a natural prejudice and distrust from most other races, they tend to put their own well-being above that of those around them, as they very rarely have the option otherwise. Due to this most Driderlings fall under either Chaotic Good or Chaotic Neutral alignments. 

Driderlings typically range in height from 3'10" and 5'2" when standing on their humanoid feet. While walking on their arachnid legs, they average between 6' and 7'. Your size is Medium.

You gain Darkvision out to range of 60 feet. You can see in darkness as if it were dim light in shades of grey. 

Your ancestry has blessed you with sharper senses. You gain proficiency with the Perception skill.

One of the few physical manifestations of your arachnid lineage are a quartet of long, slender, spider legs that extend out from your back. Your movement speed increases to 35 feet and you gain a climbing speed equal to your movement speed. 

The tongues of your ancestors come to you naturally. You can speak, read, and write Common, Elvish and Undercommon.