[Alluka's panic pauses when she realizes that Killua knows something about this. Then it compounds even further.]

What did Nanika eat?! When she showed up and talked to me, I couldn't see what she was holding, so...

[A part of her knows the answer from the obvious layout of the familiar face and bodies in the nightmare, but the side that is still wracked with confusion and fear is the dominant one, unable to get her thoughts straight for long enough to accept the blunt reality of what she saw.]

If it's not poison, what is it?