So, i've attempted to get the treasure cards multiple times now, with no such luck. I'm using a Dwarf deck that is all about threat reduction and infinite resource generation. Last game I almost got the key, but had to whittle the encounter deck down to the last 3 cards, and just couldn't get the troll cave explored in time. Is there some trick to this? "The End Comes" helps if you miss out on the card because of it being drawn as a shadow card or discarded from questing… likewise, "risk some light" can help you draw it perfectly. However, it seems like unless you tailor your deck to specifically accomplishing this mini-quest, its nearly impossible to pull off… I find that to be a bummer, because its not really based on skill, its based on luck. You either draw it, or you don't.
Am I right? Or is there something I missed that makes accomplishing this task possible without tailoring your deck to include TEC and RSL?