Cave Entrance
The Hobbit: Over Hill and Under Hill #41 (x2)
1 (3)

While Cave Entrance is in the staging area, it gains:'Forced: At the end of the round, place the top X cards of the encounter discard pile on the bottom of the encounter deck. X is the number of players in the game.'

That, of course, is the dangerous part about caves: you don't know how far they go back. –The Hobbit