Wah, i was wrong. Gon can't emit aura at all so he can't use Nen, huh? So by now, it seems Alluka's ability had it flaw too, if it caused by that healing.
Now there's Zoldyck ancestor who is Netero's friend.
And that DC scene so amazing and so gigantic. Those 3 looks like ants (if you know what i mean XD)
So, Gon condition will makes his way included on this arc. That healing herb probably the key for Gon.
For, intermezzo : If by chance, Someone asked Alluka to "make Gon's aura back" and it's works. Is that concluded as "healing" or "wish"??
With this, i am confused though. Which one of the "order" alluka's did? "Return Gon back to normal" or "heal Gon". It can be a mistake was on Killua's part.