Only take for a deck that has a superb effect.

Akachi Onyele and Father Mateo have super powerful effects so they are obvious benefactors. Father Mateo especially likes this since he has a choice of benefits in addition to an "Automatic success" result.

An incredible trump card to play against a key opponent, a game-stopping treachery like Locked Door or to gain tempo during crunch-time. This card is as varied as the important tests that may come up. In single player try to hold onto this for those tests that you just aren't geared for (Aforementioned Locked Door is a good example of something that just screws over a . In multiplayer the card also gains a new niche as a way to net easy, no-risk kills on enemies engaged with your friends.

Don't forget that you can boost a buddy, characters like "Skids" O'Toole, Finn Edwards, Silas Marsh or Zoey Samaras all get massive benefits, some of which really kick off with foreknowledge (Like Zoey's damage buff, which is incredibly powerful when you can plan and account for it, all of a sudden she can one-shot a major threat.).

An extremely fun and exciting addition to the game.

This card is kind of similar to Vicious Blow, in that it allows one of your attacks to deal +1 damage, provided that the attack hits. A very strong effect.

To flesh out the comparison a bit more:

--Compared to Vicious Blow, Marksmanship costs 2 more resources and 1 more XP;

--Marksmanship only works on Firearms or Ranged weapons;

--Marksmanship doesn't grant +1 to hit;

--Marksmanship can't grant bonus damage against enemies engaged to you.

However:

--Marksmanship can target enemies one space away, which is very nice and can often save you an action;

--Marksmanship ignores Aloof and Retaliate. In this case I don't think avoiding Retaliate is that significant. You probably wanted to heavily boost your Marksmanship attack anyway, such that your odds of hitting were very high; this means Retaliate is not a huge concern. (And of course some targets won't have this keyword anyway.) Avoiding Aloof is a nice action-saver when it comes up. But this is going to be relatively uncommon because not many enemies both have this keyword and are reasonable targets for Marksmanship. (It's a bit of a waste to snipe a Whippoorwill).

On the whole, I think Vicious Blow is the stronger card; its advantages will basically always be helpful. Marksmanship's advantages are much more situational, requiring specific enemy keywords and specific enemy placement, which you may or may not encounter in any given scenario.

With that said, Marksmanship is still a very welcome addition to the Guardian class and something I will gladly run in addition to Vicious Blow. +1 damage is extremely powerful. (This will be obvious to any veteran of Arkham Horror LCG, but if you want an explanation of why +1 damage is so good, read my review of Vicious Blow.) So Marksmanship will be well worth running, provided that you have a lot of Firearms in your deck. Ideally, these will be really strong firearms like Lightning Gun, because that increases the chance you can get maximum value from Marksmanship by sniping a powerful enemy one location away in only one shot. (The generous to-hit bonus on something like Lightning Gun or Shotgun will also reduce the chance that you miss and waste the card; this is particularly welcome since Marksmanship itself does not help your attack hit.)

It's interesting to consider whether this or Time Warp is better. They're both 2 XP Mystic spells. They both fulfill the same primary function by allowing you or a teammate at your location to overcome a bad chaos token pull.

In favor of Time Warp:

--Time Warp is one resource cheaper.

--Time Warp works against the autofail.

--Time Warp allows you to redraw bad pulls that aren't special tokens (e.g. the -6 and -8 on Expert.)

--Time Warp can occasionally help you outside of skill tests.

On the other hand:

--Counterspell doesn't have the risk of cancelling a bad token only to pull another bad token.

--Counterspell is much better at helping you avoid the negative effects of special tokens (particularly relevant for Shrivelling V.)

They're both decent cards, and it's really just going to come down to personal preference. I lean slightly towards Time Warp, most of the time, since the ability to redraw the very worst chaos tokens (which Counterspell unfortunately cannot touch) just seems a little more powerful to me. And if you're running a Paradox deck (and who isn't?), then you pretty much have to pick Time Warp.

Now that Arcane Research is a thing, I think this card needs to be reconsidered. I believe it is stronger than Ward of Protection II (which is, no doubt, a great card): while cancelling other investigators' treacheries is very useful, I think cancelling monsters is better. The 5 XP cost used to be prohibitive, given the abundance of other very strong Mystic XP options, but now that you have 1 or 2 free XP per scenario to upgrade spells, the actual XP cost will be much more palatable.

Cancelling enemies is extremely powerful. 3+ health enemies are, by and large, the worst encounter cards you can draw. Compared to treacheries, enemies take more resources, more skill tests, and more actions to dispose of. The number one way to lose in this game is to draw too many enemies in short succession and get overwhelmed. Being able to cancel the likes of Conglomeration of Spheres or Boa Constrictor for zero actions is a huge help. These monsters will otherwise suck up most or all of your turn, use up valuable spell charges, and, if the chaos bag doesn't cooperate, could easily survive into the enemy phase to cause you more grief.

This is particularly great for solo Mystics, but even in multiplayer, I think Arcane Research makes this worth picking up.

Note that this card also cancels Surge (unlike the lower-level Ward of Protections). That will be handy on occasion (particularly against Beyond the Veil), but it's really the monster-cancellation that is the big deal here.

This is one of those really cool trump-cards that may or may not blow a scenario out of the water. It's obviously more likely to pull its weight with more players and more pulls from the deck, but even in two player the card is warranted as a way to clear two or three foes at once.

A few factors in this card's great strength:

• You pick the target, obviously you pick the easiest one, this means you can hit a Ghoul Priest by targeting a Swarm of Rats.
• It's an extra 2 damage attack, when Shrivelling inevitably runs out you wont be dead in the water just yet. Also every additional target hit by the area effect is effectively a saved Shrivelling charge.

So, why then does not every deck have 2 copies? Because it's extremely expensive that's why! Obviously a card capable of hitting as many foes as Shrivelling has charges is going to be very expensive. Playing this card will prevent you from utilizing Arcane Studies, slow down the rate at which you play Spirit Athame, Holy Rosary, St. Hubert's Key and so on and on.

So, to play this card, make sure you're accounting for the cost, and if you can't then just leave it well enough alone. Also, avoid in solo, playing Storm of Spirits against a single target isnt terrible, but the severely reduced chance of multiple hits in solo reduces the value of this card drastically.