Knight of the White Tower's resource cost must be paid from a single hero's resource pool.

"...to be only a man of arms of the Guard of the Tower of Gondor is held worthy in the City, and such men have honour in the land." –Beregond, The Return of the King

Response: When an enemy attacks a player, that player may declare up to 3 eligible characters as defenders against this attack. Then, the players as a group may spend 2 resources to ready each defending character that takes no damage from this attack.

Action: Spend 1 resource to exhaust Súlien. Then, each location in the staging area gets -1 until the end of the phase. Any player may trigger this action.

Action: Choose a hero you control. Each hero with lower threat cost than the chosen hero gets +2 until the end of the phase. Then, the players as a group may spend 2 resources to give +2 to each hero with lower threat cost than the chosen hero until the end of the phase.

Wherever he came men's hearts would lift again, and the winged shadows pass from memory.
–The Return of the King

Response: After Guardian of Ithilien enters play, return an enemy engaged with you to the staging area.

From such men the Lord Denethor chose his forayers.to harry the Orcs and other enemies that roamed between the Ephel Dúath and the River.
–The Two Towers

Ranged.

Response: After Legolas commits to a quest, discard a card from your hand to ready another hero. If that hero is Gimli, he gets +1 until the end of the phase. (Limit once per phase.)

“I go to find the Sun!”
–The Fellowship of the Ring

Sentinel.

Response: When you play Erebor Guard from your hand, discard the top 2 cards of your deck to reduce its cost by 2.

...the fortress of the dwarves could not be taken by surprise. –The Hobbit

While there is a side quest in the victory display, Halfling Bounder gains:"Response: Discard Halfling Bounder to cancel the 'when revealed' effects of an encounter card that was just revealed from the encounter deck."

"The Bounders have never been so busy before."
–Sam Gamgee, The Fellowship of the Ring

Play only if you control a unique character with the Noble trait and another unique character with the Scout trait.

Response: After a player engages an enemy, reduce his threat by X, where X is that enemy's printed

...the Captains of the West were well warned by their scouts...
–The Return of the King

Action: Deal X damage to an enemy engaged with you. X is the number of side quests in the victory display.

...the tides of fate had turned against them and their doom was at hand. –The Return of the King

You may use resources from Kahliel's resource pool to pay for Harad ally cards of any sphere.

Action: Discard a Harad ally from your hand to ready a Harad character in play. (Limit once per phase.)

...the Southrons were bold men and grim...
–The Return of the King

Ranged.

Response: After Yazan is declared as an attacker, deal 1 damage to a non-unique enemy in play. (Limit once per phase.)

Response: At the beginning of the quest phase, search the top 5 cards of the encounter deck for an enemy and put it into play engaged with you. Then, reveal 1 less encounter card this phase (to a minimum of 0). Shuffle the encounter deck.

"We must press our Enemy, and no longer wait upon him for the move."
–Aragorn, The Return of the King

Sentinel.

Response: After Jubayr exhausts to defend an attack, discard 1 facedown shadow card from a non-unique enemy. (Limit once per phase.)

Response: After Firyal commits to the quest, look at the top card of the encounter deck. Then, you may discard the looked at card.

Play only if you control a unique character with the Ranger trait and another unique character with the Warrior trait.

Response: After you engage an enemy, that enemy cannot attack you until the end of the round.

Play only if you control a unique character with the Noble trait and another unique character with the Ranger trait.

Response: After a hero you control participates in an attack that destroys an enemy, add X resources to that hero's pool. X is the just destroyed enemy's printed

Play only if the main quest has no keywords.

Action: Remove X progress from the main quest to place X progress on a location in the staging area.

"Well," said Boromir, "when heads are at a loss bodies must serve..."
–The Fellowship of the Ring

Response: When you play an event, give it Doomed 1. to draw a card. You cannot trigger this ability if you have already triggered the ability of a Steward of Orthanc this round.

"...the power of Orthanc cannot be lightly thrown aside..."
–Saruman, The Two Towers

Response: After Hirgon quests successfully, play a ally from your hand, reducing its cost by 1 (to a minimum of 1). Then, you may raise your threat by 1 to give that ally +1 and +1 until the end of the round.

"Hirgon I am, errand–rider of Denethor, who bring you this token of war."
–The Return of the King

Play only if you control a unique character with the Warrior trait and another unique character with the Scout trait.

Response: After the players have committed characters to the quest, discard a non-unique enemy in the staging area. Then, reveal an encounter card.

Attach to a Hobbit hero. Limit 1 per hero.

Attached hero gets +1 for each Song attached to it.

"I sit beside the fire and think
of how the world will be
when winter comes without a spring
that I shall ever see."
–Bilbo Baggins, The Fellowship of the Ring

Response: Discard Dúnedain Lookout to cancel the 'When Revealed' effects of an enemy just revealed from the encounter deck.

"Travellers scowl at us, and countrymen gives us scornful names."
–Aragorn, The Fellowship of the Ring

Attach to a hero. Limit 1 per hero.

Attached hero gains the Ranger trait.

Response: After you play Doughty Ranger from your hand, draw a card.

...he went forth clad only in rusty green and brown, as a Ranger of the wilderness.
–The Fellowship of the Ring

Play only if the characters you control have a total of at least 9 different Traits between them.

Action: Ready each character in play. Until the end of the phase, each character you control gets +1

"For the rest, they shall represent the other Free Peoples of the World: Elves, Dwarves and Men."
–Elrond, The Fellowship of the Ring

Response: After Fastred defends an enemy attack, return that enemy to the staging area to reduce your threat by 2. (Limit once per phase.)

"King's man! King's man!" his heart cried within him.
–The Return of the King

Attach to a hero. Limit 1 per hero.

Action: Spend 1 resource from attached hero's pool to give attached hero +1 until the end of the phase. (Limit 3 times per phase.)

"I will not say the Day is done.
nor bid the Stars farewell."
–Sam Gamgee, The Return of the King

Action: Ready each hero with a Song attachment.

And then all the host of Rohan burst into song, and they sang as they slew, for the joy of battle was on them, and the sound of their singing that was fair and terrible came even to the City.
–The Return of the King

Defender of Cair Andros gets +X where X is the tens digit of your threat. (Limit +4

Valour Response: After Defender of Cair Andros is declared as a defender, deal 1 damage to the attacking enemy.

Play only if you control a unique character with the Rohan trait and another unique character with the Gondor trait.

Response: At the beginning of the combat phase, you resolve the step in which you attack enemies before resolving enemy attacks this phase. (Each other player resolves the combat phase as normal after you resolve your attacks.)

Attach to a hero. Limit 1 per hero.

Attached hero gains the Scout trait.

Response: After you play Fearless Scout from your hand, draw a card.

...he got right up to the fire–for fire it was–without disturbing anyone. –The Hobbit

Action: Draw 1 card for each Pipe you control. Heal 1 damage from each hero with a Pipe attachment.

How Old Toby came by the plant is not recorded, for to his dying day he would not tell.
–The Fellowship of the Ring

Folco Boffin gets -1 threat cost for each Hobbit hero you control.

Action: Discard Folco Boffin to reduce your threat by 7. (Limit once per game for the group.)

...he had many friends, especially among the younger generation of Hobbits (descendants mostly from Old Took)
–The Fellowship of the Ring

Action: Spend 1 resource to ready Knight of Dale. (limit once per round).

Valour Action: Ready Knight of Dale (limit once per round.)

Attach to a hero. Limit 1 per hero.

Attached hero gains the Noble trait.

Response: After you play Diligent Noble from your hand, draw a card.

Combat Action: Deal 3 damage to a non-unique enemy engaged with you.

Valour Combat Action: Discard a non-unique enemy engaged with you.

When thirteen had fallen the rest fled shrieking, leaving the defenders unharmed, except for Sam who had a scrath along the scalp.
—The Fellowship of the Ring

Cannot have restricted attachments. Enters play exhausted.

Leaflock gets +1 for each damaged Ent you control (limit +4

Action: Discard an ally you control to choose and discard a Condition attachment.

"By our valour the wildfolk of the East are still restrained, and the terror of Morgul kept at bay; and thus alone are peace and freedom maintained in the lads behind us...
–Boromir, The Fellowship of the Ring

Response: After Beorning Guardian participates in an attack that destroys an enemy, discard Beorning Guardian to place X progress on a location, where X is the destroyed enemy's printed

"...if it were not for the Beornings, the passage from Dale to Rivendell would long ago have become impossible."
–Glóin, The Fellowship of the Ring

Play into your play area unattached.

While unattached, attach to the next eligible enemy that engages you.

While attached enemy is engaged with you, reduce the total in the staging area by X, where X is attached enemy's printed

Play only if you control a Noldor or Silvan hero.

Planning Action: Shuffle a set aside Wind from the Sea into the encounter deck. Then, remove Flight to the Sea from the game.

"...they may pass to the Sea unhindered and leave the Middle–earth forever."
–Haldir, The Two Towers

Each Dale character you control with a player attachment gets +1

Response: After you play an attachment on a Dale character without an attachment, draw a card.

"He is a strong king, and his realm now reaches south and east of Esgaroth."
–Glóin, The Fellowship of the Ring

While playing an Item attachment, Bard son of Brand is considered to have the printed and icons.

Response: When a character leaves play, return each attachment attached to that character to its owners hand. (Limit once per phase.)

Reduce the cost to play Armor attachments on Redwater Sentry by 1.

Redward Sentry gets +1 and gains sentinel while it has an Armor attachment.

Reduce the cost to play Weapon attachments on Warrior of Dale by 1.

Warrior of Dale gets +1 and gains ranged while it has a Weapon attachment.

Action: Exhaust Long Lake Trader to move an Item attachment from a character you control to another eligible character.

"Nowhere are there any men so friendly to us as the Men of Dale."
–Glóin, The Fellowship of the Ring