Monterey Jack (Relics of the Past) - This Belongs in my Hand

You will be functioning mainly as a cluever. Use your high to evade or Backstab enemies, while gathering clues. You will want to keep getting clues off of locations so that you can make use of your ability to cheat out relics and charms. "I'll take that!" gives us action compression and and a discount on playing our items from hand when we do the two things we're best at: evading and investigating. Since we have 7 accessories, we will use In the Thick of It to have Relic Hunter at level 0. Hallowed Mirror lets us heal, while Talisman of Protection saves us from dying. With Dowsing Rod, Dr. Milan Christopher, and St. Hubert's Key, we can be investigating at 7.

Upgrades:

The Skeleton Key does everything we want for the fair price of 4XP. It is a relic that does not take up any slots, and helps us investigate. Turning a location to 1 shroud means our base 4 should make getting clues pretty easy even without any buffs. We can cut a Chthonian Stone for it.

2 Ornate Bows gives us some much lacking combat potential. The downside is it takes up both of our hand slots, but the best part is, it is a relic, so we can find it with our ability or better yet, find it with Dr. Elli Horowitz so it doesn't take up any slots. Take out the 2 Backstabs to make room for it.

Underworld Market lets us build a side deck of useful cards while keeping our main deck full of relics. Cards to put into the market include Lockpicks, Burglary, Hidden Pocket, Disguise, Tennessee Sour Mash. We can also put Pickpocketing in there. Once we get access to Lockpicks, we should upgrade our Lucky Cigarette Case, as we will be testing at 9+ on our investigations and will be able to dig through our deck.

2 Hemispheric Maps give us a passive bonus to , which is great for clues, and brings our up to something a little more useable. Also, it's a Relic. I would say take out a Disc of Itzamna and The Chthonian Stone for the maps.

Lola Santiago gives us two stats we love, and lets us spend 1 resource to get a clue as a fast action if we have The Skeleton Key. Replace Dr. Milan Christopher with Lola. If you are missing out on Dr Milan's resource gain, you can add in two Cheat the System, as that is a fast 3-5 resources in most cases.

Add Charisma so we can have both Lola Santiago and Dr. Elli Horowitz. Sadly, Dr. Elli Horowitz is unique, so we can't have two of her regardless.

3 Segment of Onyx only cost 1 XP and are slotless relics. If we are clearing off clues, assembling the Pendant of the Queen should be no problem. Do be aware though that the finished pendant does take up an accessory slot.

2 Otherworldly Compass are relics that help us get clues more consistently. They do have anti-synergy with The Skeleton Key, but we can use these without using an action to set up if these are already out, and can turn some high level shroud locations into 0 shroud locations. Also have great synergy with Lola Santiago.

2 Grotesque Statue is a very useful relic that uses hand slots instead of accessory slots. And will discard after its charges are gone, freeing the hand slot back up. You can opt for The Chthonian Stone instead, but I think Grotesque Statue is better.

The Red Clock and 2 Eon Chart, Disc of Itzamna are good relics to upgrade into, but they all use accessory slots. Either drop assets that already use accessory slots, or pick up another Relic Hunter.

Pickpocketing is a better Pickpocketing. Easy upgrade if you have the XP to spend, but not a high priority.

Disclaimer

I have not had the chance to play this deck yet. It is designed for 1-2 players, as if you go more than that, the number of clues and monsters goes up even more, which might be difficult to deal with and if another seeker is also getting clues, you might miss out on triggering your ability. Let me know what you think of the deck :)