Fighting in the Fields
The Flame of the West#77 (x1)
Quest
5A-B (20)
When Revealed: The first player adds The Witch-king to the staging area (Sorcerer side faceup). Then, he searches the encounter deck and discard pile for a Fell Beast and attaches it to The Witch-king, if able. Shuffle the encounter deck. Each other player reveals an encounter card.

And now the fighting waxed furious on the fields of the Pelennor; and the din of arms rose upon high, with the crying of men and the neighing of horses.
-The Return of the King
The Witch-king and shadow cards deal to The Witch-king are immune to player card effects.

Forced: When an enemy attacks and destroys a character, deal 1 damage to Minas Tirith.

This stage cannot be defeated unless Aragorn is in play and The Witch-king is in the victory display. If the players defeat this stage, they win the game.