This card is completely useless within the "repackaged only" content!! They should have almost replaced it by another card from another set in the repackaged Dream Chaser. A bit of a disappointment.
This card seems to have been made specifically for the Weather Hills quest.
In normal times, the effect isn't that useful. But in the weather hills quest, because of the 1B forced effect: "After the active location is explored, reveal the top card of the Orc deck and resolve it as if it was just revealed from the encounter deck", it makes removing locations from the staging area have double use, first you get rid of a location, but it also prevent drawing from the orc deck for every single explored location (since the quest effect only applies to the active location). Keep in mind you can exhaust a ranger ally, and it doesn't need to be a hero.
Just look at the card: "Concealed Orc-camp", not only you need to add an orc to travel to the location, but the quest also make you reveal an orc when you explore it as active location. Since that location only has 2 quest points, and all enemies have at least 2 threat, Playing Expert Tracker means you will skip 2 orcs from entering play. This is huge, especially in true solo.
The biggest downside to this card is that it's a 1 time use, so you can't really rely on that card alone to get rid of all the locations in the staging area. Probably also need a card to get it back from the discard. Or other location control cards such as Riddermark's Finest or Northern Tracker.
Most comments already told how good this card is. I just discovered that it's a favourite of mine comined with [Greenwood Defender]. Let him chunk 1-2 Attacks, revive him, let him do it again. Awesome for keeping attackers up.
Note that, due to the difficulty to properly combine Messenger of the King with the intent of this new contract, we at ALeP we have proposed a new wording for Messenger of the King inside our Free to Choose List, that you can find at this page alongextendedparty.com
The new wording of Messenger of the King basically turns the MotK hero into a starting hero in all respects, so if you want to use MotK with say At the End of All Things, the MotK will be one of your two starting heroes with all that entails (like not being able to gain resources from attachments). The same would be true for something like The Grey Wanderer or Bond of Friendship, with the MotK hero taking the place of a starting hero.
I'm surprised that as of this writing, none of the reviews on this page have mentioned Lórien's Wealth yet. I started with the revised core set and as soon as I saw the two right next to each other, I wondered what the use of Gandalf's Search could be over Lórien's Wealth. Sure, you can pay 1 resource to have any player draw 1 card with Gandalf's Search, but as soon as you pay 2 resources to still only draw 1 card, it loses to Gléowine (also in the core set), and if you pay 3 resources, it loses to Lórien's Wealth, and it just keeps plummeting from there on out. Sure, you get to rearrange the top of your deck, but isn't drawing cards better than rearranging them almost 100% of the time? Especially on a one-shot effect where you have to pay more resources to look at and rearrange more cards. And by the time cards and scenarios came out that finally did care about the top cards of your deck, we had already gotten much better deck rearrangement options like Imladris Stargazer and Wizard Pipe. The only time I have ever used this card was when playing the mono- starter deck from the revised core set, and that was only to pay 1 resource to draw 1 card.
I did see a comment on a Youtube video a while ago (I don't remember which video) where the commenter had made a house rule errata for Gandalf's Search: it costs 3 instead of X, and lets the chosen player search their entire deck for a card (and then shuffle their deck) rather than searching only the top few cards of their deck. I wonder, if that were the case, how much more play would it have seen? Would it have been worth it to use a deck slot and pay 3 lore resources to have a player search out their combo piece? And, on the other hand, would it have been healthy for the game to have a deck-searching card right from the beginning? But I'm not a designer.