Responses
Only his chain jail ability is strictly tied to the phantom troupe, though. And when he thought they were dead in the yorknew arc he was still able to use nen (if I remember correctly). But I'm still worried about his abilities since they stem from his need for revenge... And there are some big threats outside the troupe (like that 4th prince, ffs).
Lol, it doesn't disable him from using sen. only the particular powers/commands that he assigned for his chains. So you will have Kurapika, but not the 100% powerful specialist guy.
Seeing the prince learning how to use nen better and better is making me really worried for Kurapika now. then we add in the phantom troupe... I just hope Kurapika stubbornness in getting revenge won't send him to his deathbed in the end.