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.
5
3
9
9 
When Revealed: Until the end of the phase, each character currently committed to the quest gets -2
and is discarded if its is 0.
Shadow: Raise defending player's threat by 5. (Raise defending player's threat by 10 instead if undefended.)
3
2
5
7
Forced: After you engage Ungoliant's Brood, your cards cannot ready for the remainder of the round.
Shadow: If this attack is undefended, exhaust all characters you control.
1
0
3
9
Forced: After you engage Forest Flies, deal 1 damage to each exhausted character you control.
Shadow: If attacking enemy is an Insect deal it 2 additional shadow cards.
2
2
4
7
While it is engaged with you, Spiders of Mirkwood gets +1 for each exhausted character you control.
Shadow: Choose and exhaust 1 character you control. If this attack is undefended, also deal that character 2 damage.
When Revealed: The player with the highest threat exhausts all heroes he controls. Then, attach this card to one of that player's heroes. (Counts as a Condition attachment with the text, "Each time attached hero readies, deal it 1 damage.")
When Revealed: The topmost enemy or location card in the encounter discard pile is returned to the staging area.
Shadow: Deal and resolve the topmost Shadow effect in the encounter discard pile for this attack.
Immune to player card effects.
Forced: After Abandoned Camp leaves play, each player must deal 2 damage to each exhausted character he controls.
Shadow: If this attack is undefended, discard all attachment cards players control.
While Glade of the Spawn is the active location, it gains:"Forced: After a Spider enemy enters play, each player must choose and exhaust 1 character he controls."
...black even for that forest, like a patch of midnight that had never been cleared away. –The Hobbit