1. Double, Double.
2. The title of this card is a single word, doubled.
3. The cost of this card is 2 x 2 = 4.
4. The level of this card is also 4.
5. Because it is exceptional, you pay double the XP to buy this card.
6. Ironically, because it is exceptional, you can only have 1 in your deck.
7. It has 2 commit icons on it.
8. Not counting the duplicating coin in the middle, there are 16 (or 2^2^2) intact coins on the artwork.
9. It lets you play any event twice.
10. Aside from the keyword, the flavor text and rules text each take up 2 lines (4 total)
11. It takes up an Arcane slot, of which you have 2.
12. It is card 320 (2^5 x 10, note 2 x 5 = 10) in "The Circle Undone" cycle.
13. It is in "Before the Black Throne", the Mythos pack containing the 8th Scenario this cycle.
14. "The Circle Undone" is the 4th cycle of Arkham Horror LCG.
15. The set symbol for "The Circle Undone" shows a severed figure 8, which contains 2 loops.
16. The Rogue class symbol has 2 loops intertwined as well.

Alright enough of that. Clearly this is a Sefina Rousseau card. Get some extra value from The Painted World, a card that normally is restricted to three plays a game. Because Painted World becomes a copy of whatever card you play it as initially, I'm fairly sure you'd have to play that same event again if you Double, Double it, instead of getting to change targets, but that's okay. There's a lot of cards worth doubling: Drawn to the Flame, Sneak Attack, Backstab, Swift Reflexes, Narrow Escape, Hot Streak. Some events wont benefit well from this (Ward of Protection, Drawn to the Flame on lower player counts, Sure Gamble), but overall you'll probably get more than enough value out of it to make it worthwhile. Hot Streak is already a very powerful Sefina card when combined with Lola Santiago, so doubling it seems strong. Speaking of Lola and Hot Streak, Preston Fairmont likes this card as well. Preston relies on events to do anything (Intel Report, Decoy, Small Favor, "Look what I found!") so this could be very valuable action economy for him. Oh, and there's also Ace in the Hole.

That said I'm not fully sure how some of the timing would work there. Could you use it to discover four clues with "Look what I found!"? Could Sefina double Think on Your Feet and move two locations instead of one, or can she not double the card since she didn't draw another enemy? I'm not sure how the timing works here. Still, I'm sure there will be plenty of targets for this card. Two paragraphs.

This card is awesome in Joe Diamond's hunch deck! It immediately saves you an action, and then another action every time you use it again. It wasn't hard for me to place it on commonly tread locations when I used it.

Esoteric Atlas takes a hand slot, so to be usable and worth an XP it must be good. It gives you 8 moves for 3 resources, a card, a play action and 4 moves actions (9 clicks), so you lose -1 net economy overall (not worth using only to get more moves). If you use Daisy Walker’s free action, the math changes to +3 net economy, which is quite good, but only if you didn’t need to use her power for a different time. The major benefit it offers is it allows you to skip locations, thus avoiding enemies that are present. If you just want to turn resources and a card into moves, Pathfinder and Shortcut are more reliable way to get free moves.

Overall, I think only Daisy is excited about this card. It helps to balance her poor combat. Given relatively limited options for tomes, she may want to take 1-2 of these as early upgrades.

Just a great addition to the card pool. Guardians that were previously interested in "I've had worse…" now have a stepping stone, and Diana Stanley can also take this.

For most of our Guardians, this card can serve as protection against horror and economy, two things they really need. For Mark Harrigan, he might be interested in avoiding damage sometimes, just to make sure he doesn't flip Sophie.

For off-class Guardians, I've already mentioned Diana, who can use this as a canceling effect. Otherwise, "Skids" O'Toole, William Yorick and Joe Diamond can all take this. I don't think any of them combo particularly hard with this card, but I think all of them could take it and have some us for it.

Finally, as this is Spirit traited, Calvin Wright can take this... and that's amazing. From what I've seen, Calvin is all about riding the edge, pushing your damage and horror up high without dying. This lets you avoid two points of damage or horror, letting you stay alive for just a bit longer.

To analyze the skull, we consider the cost and the benefits. The effect of the skull is that each time you spend a charge, you gain a resource and a card. But anyone can spend an action for a card or a resource, so the real benefit of the skull is that it gives you the other one as well. This means the skull gives you one of whatever you least want at the time – if you really want a card, you could have spent the action getting a card even without the skull, the benefit of the skull is that you also get a money. If you wanted a money, it gives you a card, and if you really wanted an action, you aren’t going to spend that action on the skull, so the skull is useless. So the upfront cost of the skull is a card and an action to play now, and the benefit is to gain one of whatever you least want, in the future, for each time you use it. So using the skull 3 times is kind of breaking even, you would want to use it 4 times to feel excited about taking the card. And since the skull is useless when drawn late, if you draw it early you want to use it at least 5 times to think it is a good card.

In my experience, it is very possible for a combat character (in a 4-player party) who plays the skull early to pick up 5 charges – indeed, to pick up all the charges they can handle. The real limitation is the actions you have to spend to use these charges. The analysis above is that if you would have to spend at least 5 actions gaining cards and/or resources, after you start gaining charges, to be happy with the skull. And that assumes you would have been happy spending the actions even without the skull (otherwise the skull really isn’t practical at all). But in my experience, most characters are kept very busy, and don’t spend that many actions over the course of a scenario drawing cards or gaining resources – and when they do, it is often at the beginning of the mission when the skull wouldn’t have charges. It is a special sort of character who has that much free time during the mission.

The Decorated Skull isn’t the sort of card that is really going to blow anyone away with its amazing power, you aren’t missing much if you never use it. But it can be fun and useful for a very specific type of character – a dedicated monster killer (so you put yourself in the right place to get lots of charges) who can’t investigate (so you have free time) and who is in a party with plenty of ways to deal with monsters (so you aren’t under constant pressure to save your friends, and thus have more free time), and who doesn’t need the accessory slot for something else.