Frequently Asked Questions

Getting Started

What is The Deck Cauldron™?

The Deck Cauldron™ is a TCG collection manager.

Track every card you own across formats and printings, build physical and virtual decks, and see what's available to play at any time.

It also covers what happens between players: loan cards out and get them back, trade with friends in a way that actually moves the cards between collections, keep a wishlist your friends can see, and sit down at a shared playmat to test a deck alone or play a game together.

How do I add my first card?

Open the Card Scan and Lookup page and choose one of three methods.

Input Methods

After Matching

What card games are supported?

Currently Magic: The Gathering is supported, with more games planned.

Your active game is shown at the bottom of the left sidebar. Each game has its own collection, decks, and color system.

Scanning & Adding Cards

How does the card scanner work?

The scanner photographs your card and uses OCR to identify it, then matches it to a printing in the catalog.

Workflow

Matching Improvements

Can I use my phone camera?

Yes. The scanner works on any device with a camera: phone, tablet, or desktop.

Grant camera permission when prompted. Hold the card flat with good lighting and let the frame settle before capture for best results.

What if the scanner doesn't recognize my card?

Switch to manual Lookup mode if OCR can't get a confident match.

Enter the set code and collector number from the card's bottom border (for example, MH3 / 42). This always returns an exact match regardless of image quality.

Does my scan session save if I close the browser?

Yes. Your scan queue is stored locally in your browser.

Close the tab, return later, and pick up where you left off. Cards stay in the queue until you confirm and add them, or manually clear the session.

How do I look up a card by set code and collector number?

On the Card Scan and Lookup page, select Lookup mode and enter two pieces of information.

Card Detail & Images

What information can I track for each card?

Each card has a full detail view with fields for quality, quantity, organization, and personal notes. All fields are editable at any time.

Card Quality

Ownership

Organization

Personalization

How do I change the image shown for a card?

Open the card detail and tap the card image to open the image picker.

What is the difference between a system image and a scanned image?

Two types of images are available for every card. You can switch between them any time from the image picker, or set which kind wins per card from the card's Card Image setting.

What does "Use as top image" mean in the grouped variants view?

When a card has multiple variants, they're grouped into a single tile in your collection.

What are the Deckbuilding Insights?

The Deckbuilding Insights panel analyzes a card's deckbuilding role and fit. Sections vary by card type, so not every section appears for every card.

Analysis Sections

Collection & Browsing

What does "Available" mean?

Available is the number of copies ready to pick up and play.

Why does a card show 0 available even though I own it?

All your copies are committed: loaned out or slotted into a physical deck.

Open the card detail to see exactly where each copy is.

What does the "Available Only" filter do?

Available Only hides cards where every copy is loaned out or slotted into a physical deck.

Use it when you want to see only what you can put into a new deck right now.

How do grouped variants work?

Cards owned in multiple versions are displayed as a single grouped tile to reduce clutter.

How do I filter and sort my collection?

Use the filter bar above your collection to narrow and reorder cards.

Filters

Sorting

Tabs

Saved Filters

Can I search cards by what's in the artwork?

Yes. The Artwork section of the filter drawer searches the pictures themselves, not the rules text.

What You Can Filter By

How do I make the cards bigger or smaller?

The slider at the right-hand end of the tab row sizes the collection grid in Card View.

It sets a minimum tile width rather than a column count, so one setting reads correctly on every screen: drag toward the large card and the tiles grow until the row can only fit fewer of them. Your choice is saved to your account.

It applies to Card View only. In List View every row is the same height, so the slider is not offered there; it comes back, at the size you left it, when you switch back to cards.

Can I edit several cards at once?

Yes. Select cards in the collection and a bulk edit bar appears in the header, showing how many are selected.

Fields You Can Set

Behaviour

Can I hide individual cards from my friends?

Yes. Each card has a visibility setting, separate from your overall collection privacy.

A hidden card stays fully yours (it still counts as owned, still fills deck slots, and still appears in your own views), but friends browsing your collection never see it, and it is never offered when they build a trade against your collection.

What are Display Settings?

Show or hide individual pieces of information on collection tiles, or choose which columns appear in List View. One set of options serves both views.

Toggleable Elements

List View

Tomes

What is a Tome?

A tome is a virtual card binder: an ordered book of nine-pocket pages you open and turn like the real thing.

Each pocket holds exactly one physical copy (four copies of a card fill four pockets), so a tome answers "where is my cardboard" the way the binder on your shelf does. Filing a card is storage, not allocation: it never changes what you own, what's available for decks, or any loan.

Tomes live in the Tomes tab of your collection. They are private to you; friends browsing your collection never see them.

How do I file cards into a tome?

Create a tome from the shelf with a name and page count, then file cards any of four ways.

Ways In

Can I sort and rearrange a tome?

Yes: pockets can be rearranged by hand or stamped into a sorted order in one go.

Chests

What is a Chest?

A chest is a box of cards with no order at all, and a table you can tip it out onto.

Where a tome is pages and pockets, a chest is just what is inside it. Each card in a chest is one physical copy (four copies of a card are four cards in the box). Putting a card in a chest is storage, not allocation: it never changes what you own, what's available for decks, or any loan.

The table is what makes a chest worth having. Dump the chest out, spread the cards around however you like, and the chest remembers where you left every one of them. Come back tomorrow and it is exactly as you left it.

Chests are independent of tomes: a card filed in a tome can also go in a chest. Chests live in the Chests tab of your collection. They are private to you; friends browsing your collection never see them.

How do I put cards in a chest?

Create a chest from the shelf with a name and a lid color, then put cards in any of three ways. They go into the chest.

Ways In

How does the table work?

Switch a chest to its Table view and the chest sits at the top right of the table. Drag cards out of it and put them wherever you want.

Deck Building

What is the difference between a Physical and Virtual deck?

Decks come in two types with different effects on your collection.

Does adding a card to a deck affect my collection availability?

Only physical decks reduce availability.

When you add a card to a physical deck, that copy is marked as slotted and won't show as available. Virtual decks are planning tools and don't affect availability.

Virtual Deck: Can I build with cards I don't own?

Yes. Virtual decks let you add any card from the full catalog regardless of whether you own it.

Use a virtual deck to plan a build before purchasing, map out a theoretical list, or prepare for conversion once you acquire the cards. The Analysis tab will then show exactly which cards you still need and suggest owned alternatives.

What is the Deck Log?

The Deck Log is a deck's own tab, next to Analysis and Goldfish, for recording the games you've actually played with it.

Deck Analysis

How does deck analysis differ between virtual and physical decks?

Both deck types share the same Analysis tab: a readiness banner, the Analysis Scope switches, the Goldfish this deck button, and six sections (Overview, Deck Health, Collection Coverage or Physical Deck Status, Deck Structure, Strategy & Mechanics, and Bring to the Table). The one place they differ is the readiness banner and the third section, which ask a different question of each type.

Shared: both deck types

Virtual Deck: answers "Can I build this from my collection?"

Physical Deck: answers "Do all my physical decks work together?"

What does the Overview tell me?

Overview is the first section of the Analysis tab: a stable, read-only dashboard. It never expands into a workspace of its own; every tile on it is a summary that opens the real section when you select it. The readiness banner above the tabs answers the one question first (can this deck be played or built right away?), and Overview then gives you Deck Facts and a summary tile for every other section.

The readiness banner

Deck Facts

The summary tiles

What do the Analysis Scope switches do?

The Analysis Scope switches sit above the section tabs and decide which of the deck's cards the analysis looks at. By default the analysis covers the commander and mainboard only, with lands included.

The switches

What the switches do not change

How does deck legality checking work?

The Legality drawer, inside the Deck Health section of the Analysis tab, checks your deck against the selected format and lists exactly what is wrong, if anything. Its header reads Legal or Not Legal for the format, with the card count and the number of illegal cards beside it.

What Is Checked

How It Updates

What are Format Recommendations?

The Recommendations drawer, inside the Deck Health section of the Analysis tab, shows typical card count targets for your format and flags which areas are low or high. Its header names the format (for example Commander Recommendations) and summarises the result: either the areas that are off, or All areas on track.

Categories Shown

Status Labels

What does Deck Facts show?

Deck Facts is a compact always-visible row on Overview, directly under the readiness banner, that gives you the key facts at a glance.

What does Deck Structure show?

Deck Structure is a section of the Analysis tab. It holds four charts about the composition of the cards in scope (the Mana Value Curve on top, then three donut charts side by side) and, below them, the Mana Base check.

The charts

Reading the legends

Mana Base

What is Strategy & Mechanics?

Strategy & Mechanics is a section of the Analysis tab. It reads the cards in scope and reports what the deck is trying to do, grouped deck-wide. It only reports what the card text supports: nothing here is a guess, and nothing here is a score.

The five cards you'll see

Primary and Support

Evidence, not scores

Some cards are still being analyzed

What is Bring to the Table?

Bring to the Table is a section of the Analysis tab. It is a preparation list: the physical pieces you might want to have with you before you sit down to play this deck, read from the text of the cards in scope. All four categories are listed on the page at once, each as its own group of tiles; scroll to see all of them. Select an individual tile to open its details: the cards behind it and how each one relates to it.

The four groups

What it deliberately leaves out

Not the same as the playmat

Some cards are still being analyzed

Virtual Deck: How does Collection Coverage work?

For a virtual deck, the readiness banner at the top of the Analysis tab shows This Brew is Ready! or Brew Incomplete. Select the Collection Coverage tab to see the Physical Conversion card, which compares every card in your virtual deck against what you actually own.

How Cards Are Matched

Required vs Optional

Expanding the Details

Virtual Deck: How do I convert to a physical deck?

When all required cards are covered by your available collection, the readiness banner reads This Brew is Ready! and the Convert to Physical Deck button becomes active. The button lives inside the Physical Conversion card, on the Collection Coverage tab.

Requirements to Unlock

Conversion Steps

After Conversion

Virtual Deck: What is Required Cards Needed?

Required Cards Needed sits inside the Physical Conversion card, on the Collection Coverage tab. It lists every card in your virtual deck where you don't own enough available copies, and suggests owned cards you could swap in.

Card Indicators

Actions on Each Card

Virtual Deck: How do replacement suggestions work?

When a required card is missing, Required Cards Needed suggests up to three owned cards you could swap in. Candidates pass through hard filters first, then are ranked by score.

Hard Filters: Candidates That Fail Are Excluded

Scoring: Higher Is a Better Fit

Physical Deck: What does Physical Deck Status show?

For a physical deck, the readiness banner at the top of the Analysis tab reads This Brew is Ready! or Brew Incomplete. Select the Physical Deck Status tab to see whether all your physical decks can exist simultaneously with the copies you actually have in hand.

Status Indicators

Cards you are short

Conflict Summary

Shared Card Analysis

Reallocation

Precons

What does marking a card as from a precon do?

It records which preconstructed deck a copy came from, and treats that origin as part of the card's identity.

A Sol Ring from a Commander precon is a separate collection entry from one pulled from a booster; they never merge, and a precon badge on the variant tile is often the only visible difference. Precon is collector metadata for you alone; friends browsing your collection never see it.

Setting It

How do I add a whole preconstructed deck at once?

The Precon Decks page lists the full catalog; search by name or set code and import one in a single step.

Three Import Modes

Exchanges

What is the difference between a loan and a trade?

They look similar and work in completely different ways. The difference is whether the card actually changes hands.

How do I record a loan?

Open the card detail for the card you're lending and use the Loans section.

Where do I see everything I have lent out?

The Exchanges page in the sidebar keeps the full ledger on its Loans tab.

What is the difference between Loaned Out and Borrowed?

Two directions of lending are tracked separately.

Where do cards a friend has lent me show up?

They sit in your collection grid alongside your own cards, on the "On loan to you" tab.

How do loans affect my availability count?

Every loaned copy is subtracted from your available count.

When the loan is marked as returned, availability goes back up automatically.

How do I offer a trade?

Open Exchanges and start a new offer. A trade is built from both sides at once: what you give and what you get are part of the same offer.

Building the Offer

Values

Does the app actually move money in a trade?

No. Cash amounts are recorded, never transferred.

There is no payments integration. Recording "$5" on a trade writes down what the two of you agreed so the history makes sense later; settling up is between you and the other person.

What happens when a trade is accepted?

The copies genuinely move: they leave the giver's collection and arrive in the receiver's, on both sides at once.

What Moves

When It Refuses

Can I counter an offer, and do offers expire?

Yes to both.

Countering

Expiry and Final States

Wishlist

What is the Wishlist?

A list of cards you want but don't have, so friends know what to look out for.

A wish is recorded against the card itself, not a specific printing: wanting a Lightning Bolt means any Lightning Bolt will do. Chasing one particular art is not what this is for.

How do I add a card to my wishlist?

Use the star control on a card, anywhere you find one: search results, a friend's collection, or the card detail view.

You can add a note to a wish, and the Wishlist page in the sidebar shows everything you're after.

What happens when I finally get the card?

The wish closes by itself. You never have to tick it off.

What do the yellow and blue stars on my cards mean?

Both mark a wish. The color says whose.

Who can see my wishlist?

Whoever you choose. Wishlist visibility is set separately from collection privacy, in Settings.

Rooms & Playmat

What are Rooms?

A shared playmat you can actually play on: drag-and-drop cards, real zones, life totals and counters, in real time.

Two Ways to Use It

How do I test a deck on my own?

Open the deck, go to its Goldfish tab, and choose Open playmat.

How do I play with other people?

Create a room from the Rooms page, then invite people to it.

Getting People In

Sitting Down

How do I move cards around the mat?

Drag them. The mat behaves like a real table rather than a set of fixed slots; a card can sit anywhere you put it.

Cards

Piles

Tokens and Counters

Tidying Up

Can other players see my hand?

No. Hidden information stays hidden, and it is enforced on the server rather than by the interface politely not showing it.

How are life and other totals tracked?

Every seat carries a life total, and anything else worth counting gets its own counter.

How do mulligans and turns work?

Mulligans follow the London rule, and turns are per-player bookkeeping rather than an enforced sequence.

Mulligans

Turns

Can I arrange my mat the way I like it?

Yes, and the arrangement is yours alone; it doesn't affect anyone else's mat.

What You Can Place

Presets

Can I change my playmat art?

Yes. Playmats belong to players, and the table surface underneath belongs to the room.

Is there an Undo button on the mat?

It's back. Undo steps through your own actions, up to thirty of them, and only ever your own.

Why do other players' cards look rotated?

Because everyone is sitting at the same table, facing in.

Your own mat is always the right way up. An opponent across from you is upside down, and players at the side seats are turned ninety degrees, exactly as their cards would look if you were all sat around a real table. Counters, life totals and area names are kept readable whichever seat they belong to.

Your own cards appearing sideways is not intended; that one is a bug worth reporting.

Account & Friends

How do I change my password or account details?

Go to the Settings page to update your account details.

From Settings you can change your username, email, and password.

What emails will the app send me?

Only what you've left switched on. Every kind of email has its own toggle in Settings under Email preferences.

How do I view a friend's collection?

If a friend has granted you access, their name appears in the Collections section of the left sidebar.

How do privacy settings work?

Control who can see your collection from the Settings page.

Separate Controls

Is there a free trial?

Yes, and during the beta it is a fixed date rather than a countdown: every new account has Curator, the top support level, free until December 1, 2026. That is the same date for everyone, whether you joined in September or the week before it ends. No payment method is needed.

When it ends you keep everything you added. Your account moves to the free Hobbyist support level, and only creating new items past its limits is paused until you upgrade. Nothing is deleted and nothing is hidden.

Your own end date is on the Billing page in Settings, along with the full comparison of support levels. If you were using the app before the paid tiers existed, that page will show a longer grant instead: early accounts were given free access well past the beta, and the date you see there is the one that applies to you.

What do the different support levels include?

Three support levels, each raising the caps of the one before it. During the beta every new account has Curator free until December 1, 2026; see "Is there a free trial?" above.

The three support levels

What raises with the support level

Included at every support level

Collector and up

Curator only