Holy Shotgun Mary|20k Series|Deck Guide

Card draw simulator

Odds: 0% – 0% – 0% more
Derived from
None. Self-made deck here.
Inspiration for
Carson Sinclair: 20k Mary, do you need anything more? AN 22' 2 0 1 1.0

Valentin1331 · 24068

Mary turns the Fireplace Ornament into an infinite Shotgun.


Credit: Romana Kendelic


As I just reached 20k points on ArkhamDB, I would like to thank the community for all the ♥ with a little celebration. I will release a new standalone-ready deck concept every week on Friday for the following months, so stay tuned and keep pressing the ♥ button if you want to see more!

This series will come with more concise explanations and are geared towards more experienced players that would like to revisit an investigator in the light of the newer cards.

As Sister Mary received the most votes on Reddit, she's the first of the series.

Please let me know in the comment which investigators you would like to see next!

Table of Contents:

  • Overview

  • Main Strategy

  • From 1 to 3 damage

  • From 3 to 5 damage

  • Other Cards

  • Upgrade Path


Difficulty: ★★★★☆
Enemy Management: ★★★★★
Clue-getting: ★☆☆☆☆
Encounter protection: ★★☆☆☆
Survivability: ★★★☆☆
Economy: ★★★★☆
Card Drawing: ★★★☆☆

Main Strategy:

What makes the Shot-guns different from any other weapon in the game?
Its capacity to deal 5 damage in one single shot.

It is enough to deal with almost every non-elite enemy in a campaign in one single attack, but it has a major downside: only 2 ammo.

What if we could reliably reach 5 damage per bullet without taking the risk of ever getting out of ammo?

From 1 to 3 damage:

To go from 1 to 3 damage per turn, you need to reliably feed the .35 Winchester with .

  • The obvious Olive McBride who makes you pull 3 times more tokens once per round.

  • Custom Modifications gives you another chance, making you pull 4 tokens per test. I will let the mathematicians among us tell us the probabilities of success based on the number of in the bag.

  • The 2 Favor of the Suns secure 6 shots per game..

  • Dark Prophecy as a backup solution in case you haven't found your Favor of the Sun. Of course, it can whiff if you have only a couple in the bag.

How to use these tutors at best?

Here is the detailed sequence with an example using random tokens:

  1. Use Olive McBride to pull 3 tokens instead of 1
    - - .
  2. Ignore one of the 3 tokens as part of Olive's ability
    - | .
  3. Of the 2 tokens remaining, you can use the of Custom Modifications to cancel one, reveal a new one, which triggers Favor of the Sun's to replace that new token with a .
    - | .
  4. Resolve chaos symbol effect(s): instructs you to reveal an another chaos token.
  5. Determine investigator's modified skill value :
    - - (-2)
  6. Determine success/failure of skill test.

As Custom Modifications lets you use Olive McBride before having to release a token from Favor of the Sun, you increase its range of use across your scenario tremendously.

From 3 to 5 damage:

Now that we can find quickly, we need to find a way to deal 2 more damage per bullet.

  • Enchant Weapon gives +1 damage once per turn and a massive boost in skill value.

    • Counting the pull of 1 , you will be testing at 3, +2 from the .35 Winchester, +4 from Enchant Weapon, +2 from the + 4 from Reliable x2 = 15 .

    • You will resolve 2 tokens, though, so the negative modifier will tend to be bigger than usual.

  • Custom Modifications - Quicksilver Bullet will turn this big value into the 5th damage as we are very likely to succeed by 3 or more.

Other Cards:

Upgrade Path:

Link to the 0xp deck

 Cost  Total
Core Upgrades 0 XP
   In the Thick of It  →  Favor of the Sun 1 XP 1 XP
   In the Thick of It  →  Favor of the Sun 1 XP 2 XP
   In the Thick of It  →  ☑ Notched Sight 1 XP 3 XP
    →  Sacred Covenant •• 2 XP 5 XP
   Guts  →  Enchant Weapon ••• 3 XP 8 XP
   Guts  →  Enchant Weapon ••• 3 XP 11 XP
   Overpower  →  Ghastly Possession 1 XP 12 XP
   Overpower  →  Ghastly Possession 1 XP 13 XP
   Custom Modifications    ☑☑ Counterbalance 2 XP 15 XP
   Daring  →  Reliable 1 XP 16 XP
   Daring  →  Reliable 1 XP 17 XP
   Custom Modifications    ☑☑☑☑ Quicksilver Bullets 4 XP 21 XP
Optional Upgrades 21 XP
More Consistency 21 XP
    →  Stick to the Plan ••• 6 XP 27 XP
   Prepared for the Worst  →  Fang of Tyr'thrha •••• 4 XP 31 XP
   Custom Modifications  →  Telescopic Sight ••• 3 XP 34 XP
More Ammo 34 XP
   One in the Chamber  →  Extra Ammunition 1 XP 35 XP
   One in the Chamber  →  Custom Ammunition ••• 3 XP 38 XP
More Bless 38 XP
   Voice of Ra  →  Nkosi Mabati ••• 3 XP 41 XP
    →  Charisma ••• 3 XP 44 XP

(View at arkham-starter.com)

Link to the full xp deck

Other concepts for Mary:

  • A Runic Axe focused Mary that recharges for more uses. I love the fact that this deck runs only 1 Asset.
    Deck Link

  • A Mary that uses Mind's Eye on the Shotgun for better skill values. That's not her best build, in my opinion, but still a fun thought.
    Deck Link

  • A deck that uses the newly tabooed Ritual Candles to turn into +4 for the Shotgun.
    Deck Link

    • This deck is not the best for me because even if you one-shot each enemy you cross, ammo is still an issue if you are the primary enemy manager.

To create your own guides, find the template I have created here


Dec 25, 2022 Adny · 1

the token replacement in your "detailed sequence" doesn't work that way. you should go back an read the clarification in the FAQ (in whichever order you stack olive & the favor, you'll never draw three tokens from the bag for olive).

Dec 25, 2022 Valentin1331 · 24068

Thanks for the comment :)

The most important part here is Custom Modifications and the fact that it lets you "reveal a new one".

The FAQ says that you must declare your intentions to use multiple effects that replace a token pull in advance:

  1. Declare that you will use Olive McBride to replace the initial token pull with 3 and ignore 1.
  2. Use Custom Modifications's once Olive is fully resolved, letting you cancel one token and "reveal a new one".
  3. Declare that you will use Favor of the Sun to replace the new token that Custom Modifications would reveal and replace it with a .

As Favor of the Sun is used to replace the token from Custom Modifications and not from the initial pull, it doesn't collide with Olive McBride.

Dec 29, 2022 nateparkes · 1

Mind blowing. Thanks!

Jan 03, 2023 acotgreave · 498

Took this deck through the fan-made Constellations standalone last night. Holy cow, that weapon is AMAZINGLY powerful. I got the gun, along with Customisations, and Relentless down in turn one, and from there was overkilling everything, generating huge resources in order to refill it. Incredible fun. Thank you!