When counting the number of Dwarf characters you control, Bombur counts as two.

"Bombur is fattest and will do for two, he had better come alone and last." –Gandalf, The Hobbit

While you control at least 5 Dwarf characters, Glóin gains:

Response: After you play Glóin from your hand, choose a hero. Add 2 resources to that hero's resource pool.

Glóin lit several more torches, and then they all crept out, one by one... – The Hobbit

While you control at least 5 Dwarf characters, Bifur gains:

Response: After you play Bifur from your hand, draw 2 cards.

"My cousins! Bombur and Bofur – we have forgotten them, they are down in the valley!" –The Hobbit

Action: Reduce your threat by 1 for each Pipe you control. Each hero with a Pipe attachment gets +1 until the end of the phase.

...he smoked and blew smoke–rings with the same vigour and delight...–The Fellowship of the Ring

At the end of the round, discard Galadriel from play.

Response: After you play Galadriel from your hand, search the top 5 cards of your deck for an attachment of cost 3 or less and put it into play. Put the remaining cards back in any order.

Boromir gets +2 while defending against an enemy with an engagement cost higher than your threat.

Response: After Boromir takes any amount of damage, ready him.

At the end of the round, discard Elrond from play.

Response: After Elrond enters play, choose one:

• heal all damage on a hero
• discard a Condition attachment
• each player draws 1 card.

Action: Add Flame of Anor to the victory display and discard the top card of your deck to ready an Istari character you control. That character gets +X until the end of the phase where X is the discarded card's cost.

"You cannot pass!" –Gandalf, The Fellowship of the Ring

The first player gains control of Aragorn. If Aragorn leaves play, the players lose the game.

Action: Spend 2 resources from Aragorn's resource pool to ready a hero.

"I am Aragorn son of Arathorn and am called Elessar, the Elfstone, Dunadan, the heir of Isildur Elendil’s son of Gondor."
–The Two Towers

Ranged.

Response: After Legolas participates in an attack that destroys an enemy, draw 1 card.

"He stands not alone," said Legolas, bending his bow and fitting an arrow with hands that moved quicker than sight. –The Two Towers

Combat Action: Ready Háma. He gets +3 until the end of the phase. At the end of the phase, discard Háma. (Limit once per round.)

"I am the Doorward of Théoden," he said. "Háma is my name." –The Two Towers

Play only after the resolving enemy attacks step is complete.

Combat Action: Exhaust and discard a Rohan ally you control to choose and discard a non-unique enemy engaged with you.

"Helm is arisen and comes back to war. Helm for Théoden King!" –Riders of Rohan, The Two Towers

Ranged.

Response: After you engage an enemy, ready an ally you control. (Limit once per phase.)

"That will be the Captain: he can master both beasts and men" –Beregond, The Return of the King

Reduce the cost of the first Trap card you play each round by 1 (to a minimum of 0).

Response: After a Trap card you control is attached to an enemy, draw 1 card.

"See! Some of the Southrons have broken from the trap and are flying from the road." –The Two Towers

Response: After an enemy is added to the staging area, exhaust Anborn to give that enemy +5 engagement cost until the end of the round. Then, deal 1 damage to that enemy.

"Now I have him at arrow–point." –The Two Towers

Response: After Mablung enters play, choose an enemy to get +5 engagement cost until the end of the round. Then, you may engage that enemy, or return it to the staging area.

"But still we will not sit idle and let Him do all as He would." –The Two Towers

Response: After a Rohan ally you control is discarded from play, exhaust Gamling to return that ally to your hand.

"...we have a thousand fit to fight on foot," said Gamling, an old man, the leader of those that watched the Dike. –The Two Towers

Action: Ready the Ring-bearer to choose an enemy engaged with you. If the Ring-bearer's is greater than that enemy's lower its and by the difference until the end of the phase.

For a moment it appeared to Sam that his master had grown and Gollum had shrunk... –The Two Towers

The first player gains control of Aragorn. If Aragorn leaves play, the players lose the game.

While Aragorn has an Artifact attached, he gains sentinel and does not exhaust to quest.

"I have no help to send, therefore I must go myself..."
–The Return of the King

Setup: Reduce your threat by 3.

Action: Raise your threat by 3 to ready Éowyn. She gets +9 until the end of the phase. (Limit once per game for the group.)

"But no living man am I! You look upon a woman. Éowyn I am, Éomund's daughter."
–The Return of the King

Combat Action: Discard Grimbold to choose an enemy engaged with a player. That enemy cannot attack that player this phase.

Grimbold's men turned aside and passed round to a great gap in the wall further eastward.
–The Return of the King

While there is a hero in your discard pile, Prince Imrahil loses the ally card type and gains the hero card type.

"We must gather all of the strength that we can find.
–The Return of the King

Reduce the cost to play Halbarad by 1 for each enemy engaged with you.

Each enemy engaged with you gets +10 engagement cost.

"Halbarad Dunadan, Ranger of the North I am..."
–The Return of the King

X is the of the active location.

Travel Action: Discard Ghân-buri-Ghân to travel to a location without resolving its Travel effect.

Ghân-buri-Ghân will not lead you into trap.
—The Return of the King

Response: After Éomer commits to the quest, spend 1 resource from his resource pool to immediately declare him as an attacker (and resolve his attack) against an enemy in the staging area.

...he was young, and he was king; the lord of a fell people.
–The Return of the King

Action: Spend 1 resource from a Rohan hero's resource pool to put Elfhelm into play from your hand under your control. At the end of the phase, discard Elfhelm if he is still in play.

"...my lord sends word that we must set ourselves in readiness; orders may come for a sudden move."
–The Return of the King

While Elrohir is in play, Elladan gets +2

Response: After you optionally engage an Orc enemy, ready Elladan.

...they rode often far afield with the Rangers of the North, forgetting never their mother's torment in the dens of the Orcs. –The Return of the King

While Elladan is in play, Elrohir gets +2

Response: After you optionally engage an Orc enemy, ready Elrohir.

"From the North we came with this purpose, and from Elrond our father we brought this very counsel."
–The Return of the King

Gimli gets +1 for each damage token on him.

Ranged.

Response: After Legolas participates in an attack that destroys an enemy, place 2 progress tokens on the current quest.

Action: Raise your threat by 1 to ready Boromir.

Action: Discard Boromir to deal 2 damage to each enemy engaged with a single player.

Ranged. Response: After you engage an enemy, ready an ally you control. (Limit once per phase.)

Response: After a Silvan ally enters play, that ally gets +1 +1 and +1 until the end of the round.

Galadriel cannot quest, attack or defend. Allies you control do not exhaust to commit to the quest during the round they enter play.

Action: Exhaust Galadriel to choose a player. That player reduces his threat by 1 and draws 1 card. (Limit once per round.)

Action: Pay 1 resource from Glorfindel's pool to heal 1 damage on any character. (Limit once per round.)

Action: Discard 1 card from your hand to give Éowyn +1 until the end of the phase. This effect may be triggered by each player once each round.

You may spend resources from Elrond's resource pool to pay for and allies.

Response: After a character is healed by another card effect, heal 1 damage on it.

Action: Discard a card from your hand to add 1 resource to a Noldor hero's resource pool, or to Aragorn's resource pool. (Limit once per round.)