[Heine shrugs a little, and tips back even further in his chair.]

You were the second person to mention experiments in the Below. I've got reasons to be interested in that.

[He reaches behind him to pull another book off a shelf without looking, shifts through it lazily, scanning for anything that grabs his attention.]

Whatever else, I'll know when I see it.

[There's a more focused look at Kaeya then.]

What are you looking for?