You are playing Nightmare mode.

Forced: When stage 1B is revealed, the number of random heroes captured is determined by the number of players, as follows: 1-2 players = 1 hero captured, 3 players = 2 heroes captured, 4 players = 3 heroes captured. All captured heroes are turned face down and considered "the prisoner," cannot be used, cannot be damaged, and do not collect resources until they are rescued, (A single player cannot have more than 1 hero captured by this effect.)

Begin with the standard quest deck and encounter deck for the Escape from Dol Guldur scenario found in the LOTR LCG core set.

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

2x Dol Guldur Orcs

2x Enchanted Stream

1x Great Forest Web

3x Mountains of Mirkwood

2x Caught in a Web

1x The Necromancer's Reach

1x Necromancer's Pass

2x Under the Shadow

2x Tower Gate

1x Iron Shackles

Then, shuffle the encounter cards in this Nightmare Deck into the remainder of the standard Escape from Dol Guldur encounter deck.

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