You know, if you're going to call people for a thing, you could explain what term like Illuminant means to those who don't know.

So, Rainbow Magic or Color Magic, whichever we call it [or so Weiss assumes from the line about Red and everything else plus hearing about Color Magic before.] ...I'm not very familiar with any of it but I'm fine with that list of possible dangers in going for it. So if you're gathering a group, then I'll be there.