Board Thread:Questions and Answers/@comment-26047416-20150127010029/@comment-24768103-20150211032552

I have to agree with you, Killua shouldn't have known about those abilities. I think it was a flaw in the writing, but maybe I'm forgetting something. As for dino's response, sure, Killua would realize that Illumi's needles have nen in them, but he wouldn't know all of the properties they have, or about how the needlemen work. He DEFINATELY shouldn't have known about dragon dive, because he wouldn't have been able to see it in action, and I doubt his family told him about it.