Two questions. This is what happened:
1)I had Branching Paths in the staging area, and only card from the encounter card was left. I knew it was Zigil Mineshaft, so I uesed Cavern Torch to explore Branching Paths. I did that during the combat phase. Now the emocunter deck was empty, but according to Branching Path's card text I had to replace it with the top card of the encounter deck. Did I play it right when I placed no new card as there was no card available?
2) What happens if the encounter deck is empty and you want to use Cavern Torch? Is it possible, or do you have to wait until the encounter deck is reshuffled? I played it like I was not able to use Cavern Torch in that situation.