[He doesn't say anything for a moment, thinking. But unlike some people who were probably spying on this conversation, he's not really concerned with the fact that Leo nearly got left behind - obviously, he's here now, so he didn't.]

That's...interesting. Definitely interesting. But we don't know if it's just colour magic that can fool them. I mean, it could be, but one incident's not enough to go on. It might be that they're fooled by any illusion spell powerful enough, or it might be because an Illuminant was casting it specifically. From what we could tell, those Illuminants were on another level entirely when it came to magic.

You know the spell, though - think you'd be up for testing it? The next time one of them shows up, if you're able to cast that spell before they see you...