This card is regularly considered rather a joke replacement for Ancient Evils. And in general, it really is. Except for Minh Thi Phan, for whom it is kind of Kryptonite.

If she has The King in Yellow out, she really should consider to rather take the doom. And even if not, it will get really painful, if she doesn't get rid of this treachery, before she draws the tome. (I've been there!) As a peril card no can protect her from it. Should have probably considered A Test of Will to mitigate this card. But paying for exile cards is harsh, if your main class is and the level 0 version is also not great, if you have to commit 3 cards to it. And it would even whiff, if you succeed by 3 or more.

Nathaniel Cho is fun and unique to play with a fighting style unlike any other investigator. However, at my tables Nathaniel Cho has also earned a reputation as one of the most fragile guardians, being very vulnerable to the many treacheries that discard your hand and resources.

Other guardians are still capable of effective combat even after losing their entire hand and all their resources if they've their weapons out. But Nathaniel Cho's reliance on fight events means that if those events are randomly discarded by a treachery, or if he no longer has the resources to play that "Get over here!" or One-Two Punch, he might become unable to effectively fight at all. And if your teammates happened to draw enemies on the same turn, you'll end up in a bad board state.

It's not that this can't happen to other guardians — running out of ammo with a Extra Ammunition in hand, for example — but it's far more likely to happen for poor Cho. Make sure your team is able to make up for it by packing evasion or supplementary fighting tools, or when they have to make the choice on Syzygy. The new Brand of Cthugha serves as an excellent slotless backup weapon.

I don't like this card, it is such a tempo lost depending on when you draw it, it is just as bad as the big brother,The Tower. I am running a 3 player RTTCU and Rex was unfortunate enough to draw this card. So far, we are on wages of sin, and he has drawn the devil in his starting hand everygame. It is such a hit in a starting set up. It, thankfully,doesn't cost 4, but that's basically still money for an ally, or asset that I just lost. Not to mention the action, and a card i can mulligan off. If you pull this at the end, that would be fine. Most cards are on the field, and I can just commit cards, and play events. I hate seeing this card and if that was the idea then good job.

What about Bob Jenkins?

If you have Moonstone in your hand and Bob Jenkins is another player using his additional action to play an asset from your hand, is he "you"?

It reads "At any time, an investigator at your location may reveal to you the Item assets in their hand. You may take an additional action during your turn, which can only be used to play an Item asset from the hand of an investigator at your location, under their control. (Both investigators may spend resources to pay its cost)."

What do you say? Can Bob Jenkins play Moonstone from your hand?

Mystics are chronically short of actions and resources. Grounded (3) saves on both by being a 0 cost Fast asset.

Imagine a Holy Rosary that doesn't take an accessory slot, costs 0, is Fast, and provides 2 health soak and it's easy to see the value of Grounded (3). For spellcasting purposes, that permanent +1 skill value isn't too dissimilar to the bonus provided by the Rosary, except it doesn't work on treacheries which makes it slightly worse.

It's great for saving you a Relic Hunter if you want that accessory slot for something else. For those of us playing on Expert, or even Hard, stacking this with the Rosary provides a much welcomed boost to the success chance of spells, with the option to boost further using resources to reach "anything but the autofail" thresholds against higher shroud/fight values. On Standard, this means that you can opt to run a different accessory: Heirloom of Hyperborea for Agnes, Lucky Cigarette Case for Dexter, or Empty Vessel for Akachi without giving up that sweet +1 . Base 4 mystics also get a buff as a result since it's much easier for them to make up the difference.

In exchange for giving worse stats than other composures, Grounded comes with an excellent 2/2 spread. Mystics can usually protect it against the mythos with Deny Existence, but it'll blow up on a single spell backlash from Shrivelling or the Azure Flame, so keep that Eldritch Inspiration, Counterspell, or Time Warp handy. If it does get discarded though, most mystics won't have recursion or the draw power to fetch it from discard, so better take a second copy.

Sadly, it doesn't work with Close the Circle or Mind's Eye, both of which would have really liked the skill boost.

Strongly consider including this on all 4 mystics and any mystic that's taken a few trauma on top of their Arcane Research.