You are playing Nightmare mode.

Forced: At the end of the refresh phase, choose an unclaimed Clue card not attached to a Mordor enemy and attach it to a Mordor enemy, if able. (If it was guarded, detach the encounter guarding it first. The newly attached Mordor enemy is now guarding it.)

If at any point there are four or more Clue cards attached to Mordor enemies, the players lose the game.

"Through Mirkwood and back again it led them, though they never caught him."
–Gandalf, The Fellowship of the Ring

Begin with the standard quest deck and encounter deck for The Hunt for Gollum scenario.

Remove the following cards, in the specified quantities, from the standard encounter deck:

2x River Ninglor

1x The Eaves of Mirkwood

2x False Lead

2x Misty Mountain Goblins

2x Banks of the Anduin

3x Gladden Fields

3x Eastern Crows

2x Treacherous Fog

3x Evil Storm

Then, shuffle the encounter cards in this Nightmare Deck into the remainder of the standard The Hunt for Gollum encounter deck.

Finally, flip this setup card over and place it next to the quest deck. Its effect remains active throughout the game, which is now ready to begin.