Does 1d6 of piercing damage 

Arachnoids can climb to 30ft with having to worry about difficult terrain.

These 8 appendages can do 1d6 slashing and piercing damage.

Arachnoids have spider like reflexes so they have advantages on perception checks. And can't be frightened or taken by surprised while conscious.

Arachnoids have long tough fingernails that they can use as weapons. These nails do 1d6 slashing damage.

Due to the need to feed Arachnoids are proficient with persuasion and intimidation checks.

Thanks to your arachnid nature you can use webs to either trap, ensure or even weponize your webbing.

You can hatch up spiderlings. These spiderlings can do everything from aiding you in battle to spy on your enemies and tell you their secrets. Thee total of spiderlings you can have all together are 8. Starting at Level 2 you can have 2 and then 2 more at 8, 12, 16, and then at 20. If your spiderlings die you can't hatch anymore until a long rest.