This is an auto-include if you’re running spirit in Heirs of Numenor and Against the Shadow. The majority of the quests have shadow cards that do this to the player, so having a free means to effectively cancel the extra damage is amazing.
Tides of Fate
Response: When a shadow card increases an enemy's by any amount, increase the defending character's by 3 for that attack. Then, the players as a group may spend 2 resources to ready the defending character and give it +3 for its next attack this phase.
The Return of the King
Flight of the Stormcaller #7. Spirit.
I like this card a lot. As far as I can tell, most shadow effects raise the attacking enemy's and most that do so only raise it by 1-3, so for 1 less resource than Hasty Stroke you get a card that still neutralizes most shadow effects in the game. Plus it has an added upside if you or another player is running , which is admittedly really satisfying to pull off. Of course you would still probably run Hasty Stroke in quests with effect- or damage-based shadow effects like the Angmar Awakened cycle, but in quests with mainly -raising shadow effects, this one is pretty neat.