This card is pretty insane, as you get to staple the effect of any level 0 asset or event to a successful skill test at no cost, along with an unexpected courage to help you with that test. As of printing, here's the valid users - Sefina Rousseau, Zoey Samaras, Father Mateo, Sister Mary, Luke Robinson, Lucius Galloway, Agnes Baker, Akachi Onyele, Marie Lambeau, Dexter Drake

Here's a list of some of the generically powerful things you can do with it, even without specific scenario/card combo interactions. "At no cost" is an insane line of text that makes it very powerful with any of the doubles from Hemlock Vale. This is just my list that I threw together, I'm sure there are other respectable cards and some that are particularly strong given specific scenarios/situations. To me the thing that makes this card sing is its sheer versatility - almost any of the below effects are very strong, and you get to choose the best one for any given situation.

Gain 8 Resources for investigators at your location: Bank Job (Hot Streak is 4xp and nets you 7 resources)

Draw 5 Cards for investigators at your location: Thorough Inquiry (All In is also 5xp, but Memories doesn't have the weakness clause)

Get an automatically successful +1 damage fight(You don't take the attack, as the enemy attack is a cost): Toe to Toe

Take an extra action every turn for the rest of the scenario: Leo De Luca

Discover 2 clues: Extensive Research

Move, discover a clue, and activate an asset (can also be given to other investigators at your location): Task Force

Deal 3 damage to each enemy (and investigator) at your location or a connecting location: Dynamite Blast

Automatically evade or deal 1 damage to all non-elite enemies at your location and connecting locations: Elaborate Distraction

Evade all enemies at your location (including elites): Cunning Distraction

Move up to 3 times without engaging enemies: Scout Ahead

Get a generically powerful yellow card: Dr. Milan Christopher

Get a generically powerful green card: Lucky Cigarette Case

And some situationally useful ones:

Gain 3 slotless horror soak for your team: Something Worth Fighting For

Gain 3 slotless health soak for your team: True Grit

Resign: "I'm outta here!"

Gain 3 supplies or ammo for assets you control: Cleaning Kit, or with soak if you have an ally slot: Venturer

Double the ammo or supplies on an asset you control: Contraband

Turn your events into skills(with no weakness, again, additional cost is removed): Crystallizer of Dreams

Grab a clue and find an enemy to kill: Kicking the Hornet's Nest

Discard a Terror treachery from an allied threat area (as long as you have at least 1 clue): Logical Reasoning

Grab any one of the masks: Cat, Fox, Mouse, Sparrow, Wolf

Trade resources, items and allies: Teamwork

Ruling from Alex Werner, FFG Game Rules Specialist via the official rules question form:

Question: Hello. I just succeeded a skill test in which I committed Memories of Another Life, which allows me to search my collection for a level zero card and play it "at no cost." Can I choose Thorough Inquiry and ignore both the resource cost in the upper left corner and also the "As an additional cost to play Thorough Inquiry, spend an action" cost listed in the first line of its text box? Thank you in advance.

Answer: No. If an ability allows you to play a card “at no cost,” you ignore just its resource cost, and must pay any additional costs.

(So Doubles are not eligible for Memories of Another Life— at least not if you don’t have an additional action to burn—and by extension, a Summoned Hound played via Motivational Speech (4) will still create an Unbound Beast, and Warning Shot will still burn an ammo, and Faustian Bargain will still put in curses. “At no cost” means the same thing as “ignoring all costs,” apparently, meaning it can still have costs.)

The real question here is if Sled Dogs are viable if you have not 4 but 6! Not only does this combo increase the maximum potential of the good boys and girls, but also helps you find them earlier, as a quasi-tutor.

On that note, this card allows playing cards that you already have the maximum number of copies in your deck, because they are not added to it. Looking at Open Gate or Fortuitous Discovery, for example.

Enjoy and go crazy ;)

EDIT: Having a third copy of Ritual Candles almost makes curses into blessings.

This card is unreal in a Lucius deck with Ancestral Knowledge. If you keep your skill card count down to exactly 10, you will end up drawing at least one of them over 3/4 of the time, and you will draw both of them nearly 1/4 of the time!

This card feels too good to be played.

A thought that itches my mind is the following: can it search for investigator exclusive cards? After all, it specifically says: even if it does not meet your deckbuilding requirements.

The "at no cost" bit makes me wonder how this (and adaptable) treat level-0 cards with xp costs. I would assume grabbing a Drawing Thin or other taboo card has at least been suggested with adaptable, but this one has a wording that suggests it would ignore the xp cost. Especially at 5 xp itself.