Deadly Marsh Adder (ennemi - The Nîn-in-Eilph - 2)
Forced: After the players advance to a quest stage return Deadly Marsh Adder to the staging area.
Swarms of Mosquitoes (ennemi - The Nîn-in-Eilph - 3)
While Swarm of Mosquitoes is in the victory display, it gains: « Forced: After the players advance to a quest stage, return Swarm of Mosquitoes to the staging area. »
Desolate Meadow (lieu - The Nîn-in-Eilph - 4)
Shadow: If this attack destroys a character, remove all progress from the current quest.
Peat Bog (lieu - The Nîn-in-Eilph - 5)
Dead grasses and rotting reeds loomed up in the mists like ragged shadows of long-forgotten summers. - The Two Towers
Quicksand (traîtrise - The Nîn-in-Eilph - 6)
Shadow: Defending character cannot ready until the end of the round.
Rotten Stench (traîtrise - The Nîn-in-Eilph - 7)
Shadow: Deal 1 damage to the defending character.
The Nîn-in-Eilph (préparation - The Nîn-in-Eilph - 1)
You are playing Nightmare mode.
Forced: When the players advance to stage 2A, add Ancient Marsh-dweller to the staging area (from out of play or engaged with a player).
There was a deep silence, only scraped on its surfacess by the faint quiver of empty seed-plumes, and broken grass-blades trembling in small air-movements that they could not feel. - The Two Towers
Begin with the standard quest deck and encounter deck for The Nîn-in-Eilph scenario.
Remove the following cards, in the specified quantities, from the standard encounter deck:
- 1x A Weary Passage (Stage 1B)
- 1x Impassable Marshland (Stage 2B)
- 3x Neekerbreekers
- 1x Hidden Eyot
- 3x Finger of Glanduin
- 2x Off Track
- 1x Low on Provisions
Then, shuffle the encounter cards in this Nightmare Deck into the remainder of the standard The Nin-in-Eilph 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.
Les Nîn-in-Eilph (The Nîn-in-Eilph - 8) 
Through the Marsh
As you trudge through endless swamp, you begin to wonder if you will ever reach the other side...
When Revealed: Raise each player's threat by 1.
Time 3. Forced: After the last time counter is removed from this stage, advance to a different stage 2A at random. Return this stage to the quest deck.
Allies enter play exhausted.
Forced: When the players defeat this stage, advance to a random stage 3A.
Les Nîn-in-Eilph (The Nîn-in-Eilph - 9) 
Lost in the Swanfleet
Lost as you are, your presence in the marsh has not gone unmoticed. An ancien and
foul swamp creature stalks your company...
When Revealed: Raise each player's threat by 1. Add Ancient Marsh-dweller to the staging area (from out of play or engaged with a player) and heal all damage from it.
Time 3. Forced: After the last time counter is removed from this stage, advance to a different stage 3A at random. Return this stage to the quest deck.
Treachery card effects cannot be canceled.