User blog comment:Lifebleedin/how does killua know zenos ability/@comment-14902757-20140128064730

This has bugged me for several days after seeing the episode, just so you know. lol. The only plausible explanation for me is that they were told by Silva of what Zeno can do carefully without exposing the concept of nen. It's unlikely that Killua has seen it because he wouldn't have been surprised about Illumi's nen or Zushi's if he'd seen anything similar. He's probably been told in detail by Silva or by Zeno himself what his gramps "power" was "like." And though he's been told of what it's like it might not have interested him yet as a child.Though with that said, Kalluto must have been really persistent on asking about dragon dive that's why he learned nen at such young age. Even Milluki didn't seem to know how to use nen because if he did, then he possibly could have understood right off the bat that the GI game is uncrackable.