Do Impaling Structures last?

If the Impaling Structure card is returned to Absolute Zero's hand, are all Impaling Structure tokens removed from the board?

Yes. That's definitely in the FAQ if not the rulebook.

Ah, yes. Thanks. Sorry for not checking.

Not how I meant that, just wanted to give a reference =)

I was actually coming here to ask if it was in the rulebook. Running the auxiliary tournament tables at PAX East, someone asked me where in the book it said that, and I wasn't able to give them an answer because I only knew that particular rule from when I was first taught. So, it's not in the main book? Next time I'll have to see if I can have a copy of the FAQ on me at the tourney tables.