From what people told me, they hear a growling sound sometimes, and sometimes they get attacked. And sometimes, like with me, nothing happens other than feeling like you're being watched.

[York heaves a sigh. He didn't want to have to think about the past, but the ship seems to want to drag all of that up again.]

No one's ever seen anything during the attacks, not a shimmer, not anything. I haven't talked to North, but I'm sure he'll have set his motion trackers so he can see something coming.