You don't require food, water, or sleep, although you still require rest to reduce exhaustion and still benefit from finishing short and long rests. You are immune to disease.

Whenever you are reduced to zero hit points, you summon a shadowy doppelganger known as a Shade, as if you had cast simulacrum. The Shade is permanently under the effects of the slow spell and can fly (hover) at its reduced walking speed, and it has illusory copies of all your equipment. It acts immediately after each of your turns, attacking whichever creature within 30 feet of your body is closest to your body (choosing randomly at a tie, and choosing you if you are conscious), and it will continue to exist until it drops to zero hit points, even if you die. The Shade will not attack constructs or creatures that do not age.

While it is summoned, you gain a level of exhaustion that lasts until it is defeated. If you drop to zero hit points again before it's defeated, the Shade's hit points are fully restored.

Your Intelligence score increases by 1, and your Charisma score increases by 2.

Little is known about how arthropod vessels age. They are assumed to have lifespans similar to a human's.

Arthropod vessels find themselves to be shorter than most creatures they meet. Your size is Small.

Your base walking speed is 25 feet.

Thanks to your infernal heritage, you have superior vision in dark and dim conditions. 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 can’t discern color in darkness, only shades of gray.

You are equipped with a protective exoskeleton. When you aren't wearing armor, your AC is 13 + your Dexterity modifier. You can use your natural armor to determine your AC if the armor you wear would leave you with a lower AC. A shield's benefits apply as normal while you use your natural armor.

Whenever you make a long or high jump, you can roll a d8 and add the number rolled to the number of feet you cover, even when making a standing jump. This extra distance costs movement as normal.

You can speak, read, and write Common, Undercommon, Abyssal.