First impression of this card was not that good. Agree with other reviewer, slow and kind of costly for a fairly minimal benefit. Reduce difficulty by 1 is basically +1 skill (unless you combo with other difficulty reduction) and thats not much. I think in some investigators and decks it can shine just a bit more though.

In rough order of potential imo

Rex Murphy might like this too since he can trigger his passive with a high skill test and make it even easier to trigger his passive in subsequent turns (e.g. in a high clue count location).

Ursula Downs and Monterey Jack might like this. It can make high shroud locations easier to clear so they can continue moving on. Ursula only tests at 7 but can use her passive for action compression Monterey tests at 9.

Norman Withers does pretty well with this. It costs 0 for him on top of the deck and he can test at a staggering 9. The bonus is still pretty useful for him since he can still do basic investigate actions and has less access to high end seeker cards. Gloria Goldberg is similar but no free cost and weaker basic investigates.

Darrell Simmons tests 7 and likes difficulty reductions.

Trish Scarborough tests 8. She might like the bonus to make triggering her passive easier (either by investigating or evading). Noted by another commenter, works with Chuck Fergus.

Luke Robinson tests at 7 and can be used at range as its an event.

Vincent Lee and Carolyn Fern only tests at 7, possibly useful for a more combat or support oriented role.

Harvey Walters, Daisy Walker, Minh Thi Phan, Mandy Thompson tests at 8-9 but probably doesn't have any particular synergy with it?

Other seekers like Amanda Sharpe and off seekers like Roland Banks probably doesnt like this due to low stats.

hey just noticed you can put this under Stick to the Plan. Nice to be able to reduce to one of these in a deck if you're going Carson (or whomever) upgrade path on Customizable cards. 200 characters here I come.

I have just recently played with Will to Survive and many times I wished I brought Stray Cat. I don't want to spend Move or anything that does not have a test inside my Will to Survive chain, I want to start my turn with all the works around me. But, also I don't want to "stay" with Hunter enemy or having to move and evade it from the prior turn, just so I can have full actions to Will to Survive on the next turn.

Stray Cat let you stay with Hunter enemy walking into you by activating the Evade on the window after Hunter enemy move but before it attacks. Now you can do other work instead on the prior turn, next turn can be fully devoted to fighting it. It's a core set synergy that I just realized this far into the game.

This applies to a deck without Will to Survive as well, it changes the usual move-fight-fight Hunter elimination tactics to just fight-fight-fight until you win. If it has 3-4 HP and you can do 2 damages a hit, the cat adds 1 test that you can fail.

Recently played Vincent Lee and it is also such a good use of his splash to counter his 1 .

Cat is a very powerful card the more you know the pain of Evade. (Have to engage first to evade, game is throwing high enemy challenge at you, how many cards you can benefit from exhaustion, how many nasty effects are turned off if not ready, etc.) Ally slot is the biggest cost, but think of the cat as build around card instead of dismissing it due to being in popular slot. Find boosts and soaks in the other slots or perhaps invest in Charisma, and you will be rewarded with extreme flexibility of the cat.

I reached out to FFG through their form regarding this card and got the following, the latter half being specific to Soul Sanctification.

Q: Can you play a card or use an action to heal while at full health/sanity? I.e. Playing Soothing Melody to draw a card while at full health/sanity.

A: No, you cannot normally heal a card that is at full health/sanity.

Q: While you have Soul Sanctification in play, can you play a card or use an action to heal your investigator while your investigator is at full health/sanity?  For example, can I play Emergency Aid on my full health investigator to generate two resources on Soul Sanctification?

A: Yes—Soul Sanctification makes a specific exception to the rule I stated previously. With Soul Sanctification, you are able to "heal” your investigator even if you are at full health/sanity, and place any excess points healed onto Soul Sanctification as an offering. Emergency Aid would place 2 offerings on SS.

Updated for the Scarlet Keys.

This is the only card that I have found that can reduce a location's shroud outside of an investigation test. This opens up cool interaction with two interesting new cards : Power Word and Runic Axe, specifically with the "Confess" and "Elders" upgrade. Both allow you to automatically discover clues, but depend on the shroud of the location, which you can lower via Arcane Insight.

Who could use this / be interested :

For the Arcane Insight + Power Word combo :

-Daisy Walker and Mandy Thompson have access to both (limiting their Power Word to level 2 and 1, respectively), but probably have better ways of getting clues.

-Marie Lambeau has access to Arcane Insight as a spell, can upgrade Power Word to the max and can also take advantage of the lowered shroud by investigating normally. She can also use her extra Spell action on the Power Word parley.

-Akachi Onyele has access to Arcane Insight since it uses charges, gets an extra charge and can upgrade Power Word to the max.

For the Arcane Insight + Runic Axe combo ("Can I axe you a question ?") :

-Akachi again has access to Arcane Insight and Runic Axe because charges, can upgrade the axe to level 4, and has a surprisingly decent Fight.

-Ursula Downs could take the Runic Axe as a Relic, but her low Fight would make it difficult to wield.

-Joe Diamond can upgrade the axe to level 2, and it plays into his strength as a flex fighter/cluever (perhaps for solo ?)

Finally, since you can use this card during another investigator's turn, any Seeker (except Vincent Lee) could do these combos with their Mystic or Guardian buddies.