Response: Exhaust Eleanor to cancel the "when revealed" effects of a treachery card just revealed by the encounter deck. Then, discard that card, and replace it with the next card from the encounter deck.

"Gondor wanes, you say. But Gondor stands, and even the end of its strength is very strong."
–Boromir, The Fellowship of the Ring

Response: Cancel the “when revealed” effects of a card that was just revealed from the encounter deck.

"There is naught that you can do, other than to resist, with hope or without it"
–Elrond, The Fellowship of the Ring

Response: Cancel the “when revealed” effects of a card that was just revealed from the encounter deck.

"There is naught that you can do, other than to resist, with hope or without it"
–Elrond, The Fellowship of the Ring

Response: Cancel the “when revealed” effects of a card that was just revealed from the encounter deck.

"There is naught that you can do, other than to resist, with hope or without it"
–Elrond, The Fellowship of the Ring

Attached character gets +1

Response: Add Iârion's Pendant to the victory display to cancel the 'when revealed' effects of a card that was just revaled from the encounter deck, or to cancel a shadow effect just triggered.

"That is just what the Rangers are: the last remnant in the North of the great people."
–Gandalf, The Lord of the Rings

Quest Response: Cancel the “when revealed” effects of a card that was just revealed from the encounter deck. Ready the hero with The Steadfast attached. Add Lay of Courage to the victory display.

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

Response: Exhaust Eleanor to cancel the "when revealed" effects of a treachery card just revealed by the encounter deck. Then, discard that card, and replace it with the next card from the encounter deck.

"Gondor wanes, you say. But Gondor stands, and even the end of its strength is very strong."
–Boromir, The Fellowship of the Ring

Response: Cancel the “when revealed” effects of a card that was just revealed from the encounter deck.

"There is naught that you can do, other than to resist, with hope or without it"
–Elrond, The Fellowship of the Ring

Response: Cancel the 'when revealed' effects of a card that was just revealed from the encounter deck.

"There is naught that you can do, other than resist, with hope or without it."
–Elrond, 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 give us scornful names."
–Aragorn, The Fellowship of the Ring

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

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

Response:At the end of the staging step, discard cards from the top of the encounter deck until you discard a treachery. Resolve its 'when revealed' effects to ready each of your questing characters. Each of your questing characters gets +1 until the end of the phase.

Setup: The first player adds this card to his hand.

Response: Add this card to the victory display and remove it from the campaign pool to cancel the "when revealed" effects of an encounter card just revealed from the encounter deck.

By fire, sun and moon, harken now and hear us!
Come, Tom Bombadil, for our need is near us!
–Frodo, The Fellowship of the Ring