For casual playtesting, the best MTG proxy back is boring on purpose: clearly marked as a playtest card, easy to distinguish from a real Magic card, and consistent across the project. A large “PLAYTEST” label, a simple geometric pattern, and an optional deck or Cube name are enough. You do not need to recreate the traditional Magic back, and doing so adds no practical value to testing.
The more important decision is not the artwork. It is whether you are making a single-sided insert, a standalone double-sided print, or a helper for a double-faced card. That choice determines whether the back will ever be visible, whether it can reveal card identity, and whether you need completely opaque sleeves.
TLDR
- Use an obviously unofficial back with a large “PLAYTEST” label or similarly unambiguous wording.
- Keep every back in the same deck visually consistent unless completely opaque sleeves prevent the differences from being seen.
- For cheap single-sided proxies, place the printed front in front of a basic land or other regular card inside a sleeve.
- Use completely opaque sleeves when a printed back, reverse face, paper color, or card thickness could reveal which card is in a hidden zone.
- For transforming and modal double-faced cards, print both faces or prepare a separate reverse-face copy that can replace the front when the card becomes public.
- Do not treat sleeves or a custom back as permission to use homemade proxies in sanctioned events. Wizards generally requires authentic cards there, apart from narrow judge-issued replacements.
What should you put on an MTG proxy back?
A functional playtest back needs to communicate one thing immediately: this object is not an authentic Magic card. Wizards describes personal, non-commercial playtest cards as distinct from sanctioned-event proxies and gives examples such as a basic land with another card’s name written on it or a printed slip placed in front of a land in a sleeve. It does not prescribe a particular casual card-back design. A visibly marked playtest back is therefore a practical application of that distinction, not an official Wizards template. Wizards’ policy on playtest cards and proxies explains the underlying boundary.
A useful generic back can contain:
- The word “PLAYTEST” in large, high-contrast type.
- A plain pattern or original graphic that does not resemble the traditional Magic back.
- A project label such as “Bant Test Deck,” “Cube Draft Copy,” or “Sideboard Trial.”
- A version date or revision number if the list changes frequently.
- A short reminder such as “Not for sanctioned play.”
Avoid putting secret card-specific information on backs that might be visible during play. Printing the card name, mana value, or reverse-face rules text on the back is convenient only when the sleeve is genuinely opaque. In a translucent sleeve, that convenience becomes a marked-card system with excellent typography.
| Workflow | What goes on the back | Sleeve requirement | Best use |
|---|---|---|---|
| Paper insert over a regular card | Usually nothing; the regular card supplies the physical back | Sleeves recommended to hold the insert securely | Fast deck changes and low-cost testing |
| Standalone single-sided print | Generic, clearly marked playtest design | Opaque sleeves if backs or materials differ | Stable test decks and Cubes |
| Double-sided DFC print | The card’s second face | Completely opaque sleeves for hidden zones | Transforming and modal double-faced cards |
| Front print plus separate reverse copy | Generic back on each piece | Opaque sleeves for the deck; reverse copy stays outside it | Easy home printing without front-to-back registration |
| Substitute-style helper | Clear identification of the represented front face | Follow the relevant rules and sleeve requirements | Keeping a DFC itself outside hidden zones |
Single-sided proxy backs are usually the easiest option
The least troublesome home workflow is a single-sided paper insert placed in front of a regular card inside a sleeve. The regular card gives the sleeve a consistent back, thickness, and shuffle structure. Your printer only has to place one face correctly, so there is no front-to-back registration puzzle waiting to consume an evening.
This also makes revisions painless. If a test card underperforms, pull out the insert and replace it rather than producing another complete card. That approach works particularly well for a changing 100-card Commander playtest deck or a package of possible sideboard cards.
Use the same paper for all inserts, trim them consistently, and place each one on the same side of its backing card. Uneven scraps, folded corners, and mixed backing materials can make cards identifiable by touch even when their backs look identical. The back design cannot rescue a deck whose construction announces, “This lumpy one is definitely the board wipe.”
A standalone single-sided print can also work, but it needs a deliberate generic back if the physical card will ever leave its sleeve. If you move from home inserts to produced cards, PrintMTG printing for MTG proxies and physical playtest cards is a relevant route to check; confirm the current back and double-faced options before building the files around a particular production method.
Double-sided printing solves one problem and creates another
Printing both faces on one object is convenient for double-faced cards because the reverse face is always available. It also demands more accurate front-to-back alignment and creates a card that identifies itself whenever the sleeve is not fully opaque.
Magic’s Comprehensive Rules require double-faced cards in hidden zones to be indistinguishable from the other cards there. They identify completely opaque sleeves and substitute cards as methods for accomplishing that. The requirement is about preventing hidden information from being revealed; it does not require every casual playtest card to carry a traditional Magic back. The current Magic Comprehensive Rules provide the formal treatment of double-faced and substitute cards.
For a home-printed double-sided card, test alignment before committing to the entire deck. Print one sheet, cut one card, place it in the intended sleeve, and check both orientations. Printer duplexing can shift or rotate the reverse side, and “flip on long edge” versus “flip on short edge” has ruined enough otherwise respectable experiments.
If accurate duplex printing is a nuisance, do not force it. Print the front and reverse faces as separate pieces. Keep the front in the deck and the reverse face in a labeled side pile or token box. When the card transforms or enters the battlefield on its other face, swap in the appropriate piece. The physical object changes, but the game state stays readable.
Handle transforming cards and modal DFCs deliberately
Transforming double-faced cards and modal double-faced cards both have two faces, but they are not played in exactly the same way. A transforming card normally enters using its front and changes when an instruction tells it to transform. A modal double-faced card generally lets its controller choose the appropriate face when playing it. Your proxy package must therefore make both faces available without revealing the card while it is in the library or hand.
Three practical setups work:
- Print both faces on one card and use completely opaque sleeves.
- Keep a front-only proxy in the deck and a clearly labeled reverse-face copy outside the deck, swapping once the card is public.
- Use a substitute-style helper in hidden zones and keep the represented double-faced card or playtest copy nearby for public zones.
The third method follows the logic of official substitute cards. Under the rules, a substitute card has a normal Magic back, clearly identifies at least the represented card’s front-face name, and stands in for the double-faced or meld card while necessary. The represented card is kept aside and used when the substitute is face up in a public zone. Wizards adopted the broader “substitute card” term in place of “checklist card” in 2020, and its Zendikar Rising explanation shows the hidden-zone-to-public-zone swap for modal DFCs. Wizards’ Zendikar Rising mechanics guide describes that workflow.
For casual proxies, you can imitate the workflow without pretending your homemade helper is an official substitute card. Label it clearly, keep the matching reverse representation close to the battlefield, and use the same method for every copy. The goal is not ceremonial accuracy. It is making sure everyone can tell what the permanent is and which face is active.
Opaque sleeves matter more than fancy back art
Hold an empty sleeve against a bright screen or lamp, then place each candidate card behind it. If you can distinguish colors, text blocks, a white paper edge, or the outline of a reverse face, the sleeve is not opaque enough for this job. Test the actual printed materials rather than trusting how the sleeve looks by itself.
The Magic Tournament Rules require sleeves used with double-faced cards to be completely opaque. They also call for identical sleeves and consistent insertion, and they allow worn, marked, or gameplay-disrupting sleeves to be rejected. Those tournament requirements are useful technical standards for building a shuffle-safe casual test deck, even though satisfying them does not make homemade cards sanctioned-event legal. The Magic Tournament Rules spell out the sleeve requirements.
Check opacity again after adding the insert. Thin white paper behind a dark proxy image can produce a different silhouette from the regular cards in the deck. If the sleeve fails the test, use a darker or truly opaque model rather than trying to camouflage every proxy back individually.
Preflight the deck before printing every back
Before producing a full deck or Cube, make a tiny test package containing a normal single-faced card, a transforming DFC, a modal DFC, and any unusually light or dark proxy designs. Then run this checklist:
- Confirm that every proxy is plainly identifiable as a playtest card outside its sleeve.
- Shuffle the sleeved cards and check whether any proxy can be identified from the back, edge, thickness, stiffness, or surface texture.
- Verify that every DFC has its second face available at the table.
- Check whether reverse-face pieces are labeled and organized well enough to find without pausing the game.
- Make sure every card is inserted in the same orientation.
- Replace split, cloudy, bent, or visibly worn sleeves before they become accidental markings.
- Print and cut one duplex sample before approving a full double-sided run.
If your project includes Battles, split cards, Adventures, emblems, or other layouts that complicate file preparation, preflight them with the same care using this guide to special MTG proxy card types. The back is only one part of keeping unusual cards readable and usable.
Keep casual playtesting separate from sanctioned play
A clear playtest back is responsible labeling, not a tournament workaround. Wizards says sanctioned-event players generally must use authentic Magic cards, with a narrow exception for proxies issued by a judge to replace cards damaged during that event. Players cannot create their own tournament proxies. In sanctioned settings, official substitute cards may represent double-faced cards under the applicable requirements, but that is different from bringing a homemade proxy deck.
For casual testing, choose the simplest back workflow that hides card identity and keeps every game state readable. Usually that means single-sided inserts over regular cards. For DFC-heavy decks, use opaque sleeves with double-sided prints or keep organized reverse-face copies beside the battlefield. Whichever method you choose, print and sleeve one test card first. It is much cheaper to discover a transparent sleeve or backwards duplex setting before the other ninety-nine cards join the experiment.