I don't thiiiiiiink (?) Wrathion knows that? Unless I have forgotten it happening in an arc he was in (or it was in a plot roll he wasn't involved in) but to be fair -- I think he'd avoid touching spooky gunk instinctively anyway just because it's gross and only touch it at a point where the vibe is 'WELL either I learn something now or I don't YOLO'. I don't think we're there yet this early on.