I submitted a question to Caleb Grace asking what happens if the last card (or the last two cards) of the scenario deck are both cards with Surge that are shuffled back into the deck once they've been resolved. This was the response I got:
"In the rare event that Blocking Wargs is revealed as the last 1 or 2 cards in the encounter deck, it creates an infinite loop. Should this happen, the players will have to reset."
Given that there are 4 copies of Blocking Wargs and two copies of another treachery card that is shuffled back into the deck and all have Surge, I'm not entirely sure that it's far to say this is a "rare event" (it's happened to me twice already), and I REALLY don't like the idea that it effectively results in an automatic loss (or as near as dammit) and you have to restart.
Thoughts? Comments? Opinions?