Tharbad Patrol
Trouble in Tharbad Nightmare#8 (x3)
Treachery

When Revealed: Attach Tharbad Patrol to a non-unique location in the staging area without a copy of Tharbad Patrol attached. (Counts as a Condition attachment with the text: "Forced: After the players travel to attached location, each player must discard the top 2 cards from the encounter deck and engage each enemy he discarded in this way.")