This card is ok if you are not prepared to make it broken. Lucius Galloway, Ursula Downs, and Monterey Jack can break this card wide open and make the game a cakewalk. How you might ask? They ask their Local Eldritch know it all to take time and put it to delaying the signs of Cataclysm and the moment someone pulls an auto fail at their location they seal it. So now, for every round, they get one or two actions, and don't worry about the auto fail, because it can't hurt them if it isn't real. This is a much better way than the another way to eat the auto fail because it doesn't require rng or a massive setup. With paying the ferry man and having someone else get xp you can get this at scenario 2 as long as you get 6 xp from the scenario (or 4 if you manage a big kills). Sledgehammer your friends all you want, you know you won't fail because they ate the auto fail.

Maybe it's a little too early to say, but I don't feel good about this one.

It has to exhaust each time an offering is placed on it, and it needs to exhaust again to give an investigator an extra action. That's a minimum of 4 turns before it's given you back the action you spent playing it. And another 4 before it's provided actual benefit. You need to be consistently placing doom on cards for the first 3 of those 4 turns for it to be even that quick.

There is something to be said about holding onto the offerings for later, as a sort of budget borrowed time. But considering how contested the accessory slot is for mystics, it's a hard bargain. Scratch that, activating the fast action removes all offerings, meaning you can't really save them up.

Maybe this will be the cycle that adds support for uses (offerings). Considering the term, it would be interesting to see something that requires a sacrifice of some sort to get you some extra offerings on your cards.

Can you attach a book to Library Pass and then move it to Abigail Foreman using Abigail's quick action? Read as written it seems possible but doesn't seem intended... You'd basically be able to completely ignore the Forced on Library Pass

A roundup of who can take Defensive Stance/what they get out of it:

Carolyn Fern:

Carson Sinclair:

Leo Anderson:

Marion Tavares (not on Arkhamdb yet):

Mark Harrigan:

Nathaniel Cho:

Roland Banks:

Sister Mary:

Tommy Muldoon:

Wilson Richards:

Zoey Samaras:

Amanda Sharpe:

Joe Diamond:

Vincent Lee:

"Skids" O'Toole:

Tony Morgan:

Diana Stanley:

Gloria Goldberg:

Lily Chen:

William Yorick:

Charlie Kane:

Lola Hayes:

Unsurprisingly, it looks like it works best as an emergency "I really need to pass this foot test" for combat-centric investigators, though it might bump the occasional Locked Door or Overgrowth into a success too.

I haven't seen this mentioned, but this card would work really well with Agnes Baker. Cancel out a treachery AND trigger her ability at the same time? Great combination.

This is basically a triple Ward of Protection, but costs 1 resource and 3 health more. Obviously you can have only 2 Ward of Protection in your deck, but together with Purifying Corruption you can cancel up to 5 treacheries! This is pretty much 1/3rd of all the treacheries you will draw. Adding Agnes Baker ability, you additionally deal 5 damage while doing that. Amazing stuff.

Assuming you don't recharge the card and only cancel out treacheries three times, the full price for Purifying Corruption would be 4 resources, 3 sanity and 3 damage. The health cost especially might be a bit high for our brave waitress, but you also have access to Heirloom of Hyperborea and assuming you have more soak (which you should, if you're playing Agnes), this is definitely something she can handle.

This card also pairs extremely well with two particular allies - Peter Sylvestre and Jessica Hyde, both of whom Agnes Baker wants in her deck anyway.

The only real drawback of this card would be the fairly expensive resource cost (4), which might be a bit high for her at times, as she generally tends to be short on supplies, especially if you run her with Fire Axe or Dark Horse, which some people do.

TLDR: So overall 4 exp and 4 resource cost for a card that will help trigger Agnes Baker ability and cancel out treacheries? Definitely something to consider.

Also, if by any chance you are playing with Carolyn Fern on the team (which is a quite common duo), all the drawbacks of Purifying Corruption magically disappear.