Just as you think the fight is over, you find tracks that lead you to what appears to be the leader of this group of Trolls. You can see Grimbeorn the Old, captured and ready to be cooked. It's up to you to save him!

When Revealed: Add Rob and Bob to the staging area. Then, each player must search the encounter deck and discard pile for a non-unique Troll enemy and add it to the staging area, if able. Shuffle the encounter deck.

A nice pickle they were all in now. –The Hobbit

When Rob and Bob have been defeated, the players have rescued Grimbeon the Old from certain death, and won the game.