When... when they decide to invade other worlds. That is when they plan on doing so.

As for how? [ A shrug. ] I can only imagine. [ She looks at him again. ] The things I've worked on this past wee-- the things I've seen... Alvin, I don't know if you saw what Lacie Baskerville had become, but I believe that could be just the beginning if Nocturne is left unchecked.