Illumi Zoldyck

Illumi Zoldyck is the eldest child of Silva and Kikyo Zoldyck, and the eldest son of the Zoldyck assassin family. During the 287th Hunter Exam, he appeared under the guise of Gittarackur. At Hisoka’s request, Illumi joins the Phantom Troupe as Uvogin’s replacement, becoming Troupe member #11. He served as a secondary antagonist of the Hunter Exam arc and the primary one of the 13th Hunter Chairman Election arc.
Strength
- Throws 14 needles at a man from a distance, killing him (source)
- Digs a hole at least 6 feet, 1 inch deep with his bare hands (source)
Speed
- Throws needles in a man’s face faster than he could react (source)
- Moves through a crowd, throwing needles at civilians without any of them noticing him (source)
- Kills 20 pro hunters before they could sound an alarm (source)
Durability/Endurance
- Ran over 80km with a portion of that running being up stairs without breaking a sweat (source)
- Has his arm broken by Gon; likely wasn’t using Ren at the time which would have increased his durability (source)
- Due to upbringing, has very strong resistance to poison like Killua (source)
- Due to upbringing, has very strong resistance to electricity like Killua (source)
Nen
Body Manipulation
- Changes the structure of his face using needles (source)
- Sinks in half of a man’s face (source)
- Transforms himself into Hisoka and uses Hisoka’s voice so convincingly that he fools the Phantom Troupe (source)
- Can keep his transformed appearance after taking his needles out for at least 5 hours (source)
Hypnotic Spell
- Controls Killua so he always has a near uncontrollable urge to flee from opponents that may be stronger than him; Killua frees himself by removing the needle from his brain (source)
Corpse Control
- Controls three Mafia Dons after killing them and makes his needle people say what he wants them to (source)
- Gets deceased people to drive off a cliff (source)
- Makes a hunter he’d killed speak on the phone (source)
Needle People
- Sticks people with his needles, causing them to die from over-exertion while obeying his orders; has a finite amount of these needles (source)
- Controls at least nine people at once (source)
- One of the needle people is able to drive normally; Killua does not notice that he’s under Illumi’s control until the needles are made visible (source)
Miscellaneous
- Hisoka rates Illumi at 9.5 in power (considering himself a 10); Hisoka had previously rated Kanzai, Ginta, and Pyon at 8.5, 9, and 7.7 respectively, who are Zodiacs and leaders of the Hunter Association (source)
- His overwhelming bloodlust can be felt from a considerable distance (source)
- Was able to figure out how Nanika’s ability works (source)
- Is honest to a fault (source)