Ienzo's first inclination is to simply pretend he hadn't even heard Aeleus speak, turning up his nose metaphorically at the offer in reaction for the slight that he still hasn't quite gotten over. It's only the offer of information - and he's none too sure how Aeleus has gotten this information he claims to have - that gets him to reconsider. He knows there's certainly things that Aeleus hasn't told him, after all, and he supposes it's not too surprising that some of that might cover worlds like this. Of course, in light of this recent irritation the fact that there are things he doesn't know doesn't much help, but eventually the lure of knowledge wins out.

He can confront Aeleus about the other things that he's noticed later, when it'll be less immediately associated with this. So he nods, and there's only a little hesitation to it. He'll gladly listen about worlds like this one.