Clearly a very situational card, it's good in scenarios where you know there'll be a lot of locations in play and preferably from the get-go.

I think this card will really shine in The Blob That Ate Everything; as long as you're not at an outer location you'll get the +2 and +2 pretty much all the time.

I'd like to take two copies of it in a Mandy Thompson search deck with Dr. Elli Horowitz and maybe the oft-forgotten Relic Hunter just in case. Assuming you have enough other sources of search as well it should be found pretty quickly, and getting +4 and for a base of 7 and 9 on a lot of locations is pretty nuts.

Location breakdown:

• 5 locations will net you the full +2
• 4 locations will net you +1
• 4 locations will net you nada

Scrying Mirror appears to be the lynchpin of many of Jacqueline's combos, such as predicting tokens that will be drawn or the results of skill tests.

Also pairs well with Mystic cards that are all about efficiency and consistency, such as Recall the Future, Olive McBride, or all of Jim.

Aside from that, this is a very good card for skill tests on BIG cards, like your friend's Lightning Gun or Eye of Truth.

Edit (7th Feb 2023): The original post below is no longer valid. As Killbray pointed out in the comments, the latest FAQ (2.0) clarified this:

(1.26) Searching During Setup
If an investigator is instructed to search a deck for 1 or more cards during setup, abilities that trigger when a deck is searched (such as Mandy Thompson’s reaction ability or abilities on Research cards) cannot be resolved, as the game has not yet begun.

Original (Outdated):

One extra cool thing about Stick to the Plan that nobody else seems to be mentioning here:

For Roland Banks, Zoey Samaras and Carolyn Fern - you can include one copy of Astounding Revelation in your deck. This will trigger when you do your initial search with Stick to the Plan, causing you to consistently start every scenario with 2 extra resources (and your deck is thinned by one extra card!). This is equivalent to having Another Day, Another Dollar, for free!

"Fool me once..." is an alright card if played fairly, for it purpose of cancelling a future encounter card - it comes cheaper than Ward of Protection (since you don't have to pay a horror), but costs an extra XP and has more stringent restrictions on when it can cancel a card. Other reviews give more in-depth descriptions of this.

However, there's an important (perhaps unintended) usage of this card: unlike most treachery-interaction cards, this one doesn't specify that it only applies to non-weakness treacheries, so you can use it to trap a weakness to avoid redrawing it when you reshuffle your deck.

Most Guardians don't really have the draw to take advantage of this, but this effect can be especially strong in Joe Diamond, who does have access to the tools needed to repeatedly draw his deck, and this can let you really easily facilitate infinite combos, even if you draw a particularly nasty weakness (such as Amnesia).

This card is actively bonkers for Daisy Walker, who can frequently draw through her entire deck to find it using Old Book of Lore and other search/draw. It costs 1 XP Total, thanks to Myriad rules, and gives you tons of free actions for resources provided you are meeting the requirements. Actions and autosucceeds are way more important than resources. And in a pinch, it pitches as a wildcard!

If you expire Pendant of the Queen when your deck is near empty or empty, you can stack your deck with three Segments and immediately draw into and play them again. Combined with secret charging abilities like Astounding Revelation and Enraptured, this card can make five-action life a reality for seekers.