Only the engaged player can declare attackers against the Witch-king.
Forced: At the beginning of the encounter phase, The Witch-king engages the first player. Then, it makes an immediate attack.
"No living man may hinder me!" -The Return of the King
Cannot have attachments.
Daechanar gets +1 for each Sorcery card in play, and gains indestructible while at least 1 Sorcery card is in play.
Forced: When Daechanar is damaged, if there is at least 1 Sorcery card in play, cancel all damage just dealt and remove a Sorcery card from the game.
Forced: When you resolve shadow cards dealt to Witch of Angmar, if they have the Sorcery trait, resolve their "when revealed" effects. (Resolve any shadow effects first.)
Only the engaged player can declare attackers against the Witch-king.
Forced: At the beginning of the encounter phase, The Witch-king engages the first player. Then, it makes an immediate attack.
"No living man may hinder me!" –The Return of the King
Immune to player card effects.
Lieutenant of Angmar cannot take damage unless there is at least 10 progress on the main quest.
Forced: At the end of the round, Lieutenant of Angmar moves to the staging area with the lowest total and makes an immediate attack against the first player.
Indestructible. Immune to player card effects.
Forced: When Sorcerer of Dol Guldur attacks you, discard the top card of your deck. Then, discard each copy of that card from play.
"A great kind and sorcerer he was of old, and now he wields a deadly fear."
–Gandalf, The Fellowship of the Ring
Forced: When Necromancer of Carn D–m would attack you, instead reanimate the top card of your deck and deal it each of the Necromancer of Carn D–m's shadow cards.