You are playing Nightmare mode.

Forced: During setup, each player reveals 1 card from the encounter deck and adds it to the staging area.

Begin with the standard quest deck and encounter deck for the Passage Through Mirkwood scenario found in the LOTR LCG core set.

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

Ungoliant's Spawn x1

Black Forest Bats x1

Forest Spider x3

Dol Guldur Orcs x3

Old Forest Road x1

Forest Gate x2

Mountains of Mirkwood x3

Caught in a Web x2

Then, shuffle the encounter cards in this Nightmare Deck into the remainder of the standard Passage Through Mirkwood 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.