Aragog's venom

[Ersatz Harry]

No: HPFGUIDX 135248

There are a handful of non-human creatures that have played a role in
the series so far, some of which have been more important that others.
 Buckbeak, for example, was quite important in POA, and Fawkes in COS.
 With some of these, I get the sense that they may matter again
(Fawkes, for example), but others feel less likely ever to matter
(Trevor and Pigwidgeon, for examples, though who knows for sure).

But what about Aragog or, more to the point, the venom that was
extracted from him by Slughorn?  Aragog is certainly a rarity among
the animals.  For one thing, he can talk.  For another, he dates back
to the time when Riddle was a student.  Can someone imagine a property
of Aragog's venom that will somehow come into play in Book Seven?

Ersatz Harry