This card is a great example of Power creep, and why it prevents the use of newer cards.

This card is in direct competition to vicious blow, and begs the question "why would I ever use this over vicious blow?"

The short answer there is that you won't. Everyone that can take this card can also take vicious blow, and vicious blow outperforms this in all scenarios.

What about taking it AND vicious blow? I could see some use in the fighter style characters without access to the heavy hitting guardian weapons. Yorrick and Silas come to mind right away. But you still have to wait for this card to take effect, meaning the enemy will most likely get an attack off. This somewhat defeats the purpose of attacking the enemies then. Most enemies have 3 HP, and the ones that have more usually have 5-6. So you do a vicious blow augmented standard attack on a 5-6 HP enemy, and it lives and your turn ends. The enemy attacks you and then this ticks. So the enemy now has ~4 damage on them. This translates to you having to attack the enemy again your next turn to finish them off, or leaving them evaded for two turns someway to make this card eventually run its course. You very quickly then get into a Rube Goldberg style problem with "why didn't you just kill it with another attack", which begs the question again of why did you take this card.

So when do you use this card? The only reasonable excuse I could see would be on enemies with exactly 4 HP, using an investigator with smaller arms and probably that also has stunning blow and can outmove the hunter keyword.

It ends up being a lot of very specific criteria to make this card worthwhile, so I can't honestly say it has a place in any deck.

If future upgraded versions had a draw attached to it, we may be talking though.

It is important to note that placing doom on David is not mandatory and to maximise the profit from him it is best not to add doom every chance you get. A good rule of thumb is that you should choose to add doom a number of times equal to one-third of the remaining doom threshold on the current agenda when you play him (rounding to the nearest whole number) before using his ability with no doom until the witching hour. For example, if running David with Calling in Favors with a 6 doom agenda, you can maximise your resource gain in a single play of David by placing doom on him twice as follows:

-Turn 1: Place doom on David, gaining 1 resource. Mythos phase brings doom count to 2.

-Turn 2: Place doom on David, gaining 2 resources. Mythos phase brings doom count to 4

-Turn 3: Use David without placing doom, gaining 2 resources. Mythos phase brings doom count to 5.

-Turn 4: Witching hour so place doom on David, gaining 3 resources. Bring David back with Calling in Favors ready to replay for the next agenda.

This allows David to generate a total of 8 resources instead of the 6 you would gain if you placed doom on him on Turn 3. The effect is even more pronounced for agendas with higher doom thresholds, but the rule of thumb remains the same: place 1/3 of the remaining threshold at time of play.

This becomes a must pick for high draw seeker decks in Dunwich Legacy.

Slot pressure is usually only to dream enhancing serum, of which you only need one. Orphic Theory can essentially block everyone's favorite treachery, beyond the veil. This ends up being a very strong counter to that card, as you can proc Orphic Theory just before you meet the criteria for Beyond the Veil to trigger. It breathes life into high draw seeker decks, which used to have to spec into Versatile -> Deny Existence to run that campaign.

Outside of that, it has some pretty great uses still for most high draw seekers. A couple of treacheries that come to mind are Arctic Wind (an absolute bane to high draw seekers in EoTE) and the possessed treacheries in Carcosa.

Overall, definitely don't count it out. If you're in a campaign with "safe" treacheries Farsight still probably wins the slot, but at 1 exp it's a godsend for those bad ones.

The obvious benefits of Breach the Door, already stated:

• Makes it possible for even the lowest intellect punching investigators to pick up clues

• Enables the clue getters to suck up clues even faster

Not mentioned yet:

Breach the Door combines very well with cards that provide benefits for 0 shroud locations. Some examples:

• Fast action exhaust Lola Santiago and discover a clue for free!

• Apply the shroud 0 to your Sixth Sense and Sixth Sense (4) when you pull a special symbol

• No curse token cost to play Stirring Up Trouble

• Automatic activation of Shed a Light to pick up 3 clues in 1 action

Special case:

• Guardians have access to a bunch of cards that trigger the discovery of clues, but they don't have access to many investigation boosters. Breach the Door definitely comes in handy when your low intellect Guardian draws the Unspeakable Oath (Curiosity) weakness.

I have a feeling that this might be good in Finn, to get a +3 Willpower, which also could double as a +1 if you really need it. Haven't tried it out though. If you have a way to boost your Willpower or Strength value, it get's even better, but that's probably not that easy in a typical Finn deck.