TLDR
The practical rule for how to label proxies in mixed real deck setups is simple: mark every unofficial card conspicuously on its front, preserve the card name and essential game information, and make every card indistinguishable while face down. “PLAYTEST” is the clearest label, although “PROXY” is widely understood. Use the same opaque sleeves and a consistent insert or backing method throughout the deck. Disclose the cards before shuffling, respect the store or pod’s answer, and never assume a visible label makes player-created cards legal in a sanctioned event.
Start with the distinction the label is supposed to communicate
A mixed deck can contain authentic Magic cards alongside unofficial stand-ins without creating confusion, but only if the stand-ins are obvious when face up and neutral when face down. The label should communicate, “This is a playtest piece, not an authentic card.” It should not attempt to make the stand-in look authentic.
That distinction matters. An authentic card is official Magic product. A proxy or playtest card is an unofficial stand-in used transparently. A counterfeit is a fake represented, or intended to be represented, as authentic. A clear front-face label supports transparent play, but the player’s conduct also matters: disclose the cards, do not trade them as authentic, and do not mix them into sale stock.
Wizards made a similar distinction in a 2016 policy statement, describing personal, noncommercial playtest cards such as marked basic lands and paper inserts separately from reproductions intended to appear authentic. That statement is useful background rather than a universal rule for every casual table or store. It also reiterates that sanctioned play requires authentic cards.
What should a proxy label say?
Use one conspicuous word: “PLAYTEST” or “PROXY.” Of the two, “PLAYTEST” is slightly more precise because the Magic Tournament Rules use “proxy” in a narrow technical sense for certain substitutes issued by a judge. Players cannot create their own tournament proxies. At a casual table, however, most players will understand either label immediately.
This is a voluntary etiquette standard, not an official requirement for a particular word, font, color, or placement. A useful label system includes three things:
- A large “PLAYTEST” or “PROXY” marker that is obvious at normal table distance.
- The complete, legible name of the represented card.
- Enough game information to identify and use the card without stopping every turn for a lookup.
If the stand-in already reproduces the necessary game information clearly, add the label in an unused area without covering the card name, mana cost, type line, relevant rules text, loyalty, defense, or power and toughness. A contrasting band across the lower art area or an open text-box area often works better than tiny writing in a corner.
For a handwritten basic-land placeholder, write the represented card’s full name across the art or text area and add “PLAYTEST” beneath it. Avoid abbreviations that only the deck owner understands. “Study” could mean Rhystic Study to you and a request to pause the game to everyone else.
Prioritize card identification over decorative art
Custom art can be fun, but the card name should remain the fastest visual cue. Put it in a consistent location and make it large enough for opponents to read without picking up the card. If an alternate treatment removes familiar frame cues, preserve the mana cost, card type, and the information most likely to affect decisions.
Dense rules text does not need to be squeezed into illegibility. The Magic Tournament Rules identify the Oracle text corresponding to a card’s name as its official wording, so an unambiguous card name and an accessible rules reference are more useful than microscopic text. Keep a current card database or the official Magic rules resources available when a test card is altered, text-heavy, or unfamiliar.
That does not excuse a mystery rectangle. An opponent should be able to tell what permanent is on the battlefield, what it costs, and what broad effect it has. Looking up one unusual interaction is normal Magic. Looking up the identity of every custom-art card is an interface failure wearing a wizard hat.
Keep every card consistent while face down
Front-face transparency and face-down uniformity solve different problems. A playtest card should be obvious once revealed, but it should not be detectable in the library or another hidden zone. Official tournament policy treats cards or sleeves as marked when they can be identified without seeing their faces, including through bends, wear, scratches, discoloration, or distinguishable patterns. Casual decks benefit from the same fairness principle even when tournament enforcement does not apply.
Use uniform opaque sleeves throughout the deck. Then choose one backing method and apply it consistently. If proxies are paper inserts, place each insert in front of a backing card of the same general condition. Do not use one bare sheet of paper among normally backed cards, and do not add raised labels to the outside of selected sleeves. Adhesive labels, extra layers of tape, curled paper, and uneven trimming can all create tactile differences.
- Check the deck from the back under normal room lighting. No face or border should show through.
- Run a finger across the top and side edges to find protruding inserts or doubled layers.
- Compare flexibility by gently handling different sections of the deck. Test cards should not form an obviously stiffer packet.
- Replace split, cloudy, stretched, or unusually worn sleeves rather than reserving the worst sleeves for proxies.
- Shuffle, cut, and spread the deck face down. Look for cards that catch, bow, or sit higher than their neighbors.
For a more complete pregame process, use the proxy deck marked-card checklist. The goal is not to simulate tournament deck checks at the kitchen table. It is to remove information that should remain hidden.
Disclose the mixed deck before shuffling
A label answers what a card is after it appears. Disclosure answers whether the group wants those cards in the game at all. Bring them up before shuffling or presenting the deck, not after the first expensive staple hits the battlefield.
A useful script takes about ten seconds: “This deck has eight clearly marked playtest cards. They are normal printed Magic cards I’m testing, not custom designs. They use the same opaque sleeves and backs as everything else. Is that okay here?”
Change the script when relevant. Mention full-deck proxying, mechanically unique custom cards, unusually strong staples, or a commander represented by a placeholder. If the decklist is available, say so. The count does not need to become an inventory presentation, but “a few proxies” should not turn out to mean ninety-nine cards and a confident smile.
At an LGS, there may be three different answers: the formal event policy, the store’s house policy, and the preferences of an unsanctioned casual pod. Ask the organizer first when an event is involved. The guide to bringing a proxy deck to an LGS explains those layers, while the 30-second Rule 0 proxy conversation offers a fuller script for Commander tables.
If the organizer or another player says no, accept the answer without turning game night into oral arguments. Bring an all-authentic alternative deck, replace the test slots, or find a pod whose expectations match yours.
A label does not create sanctioned-event legality
As listed on the WPN rules page, the February 27, 2026 Magic Tournament Rules require authorized cards in sanctioned events to be genuine, regulation-sized Magic cards publicly released by Wizards. Unauthorized cards are prohibited. The rules’ tournament use of “proxy” refers to a substitute issued by a judge for an otherwise legal card that becomes unsuitable under limited circumstances—not a stand-in prepared by a player. Read the current Magic Tournament Rules and confirm with the organizer before entering an event.
Therefore, writing “PLAYTEST” in giant letters is good casual transparency, but it does not authorize the card for sanctioned play. Rule 0 is a social agreement for casual games. It cannot override tournament policy, an organizer’s conditions, or a store’s rules.
Handle common proxy-labeling edge cases
Double-faced cards
Label the front clearly and ensure the back cannot show through the sleeve. If the physical stand-in has two usable faces, make both faces identifiable and keep the correct orientation obvious. Another casual option is a clearly named placeholder in the deck with the represented card kept separately for battlefield use. Agree on the method before play, especially if transforming or modal double-faced cards appear frequently.
Custom-art cards
Do not let art replace identification. Use a large card name, visible mana cost, and a clear playtest marker. If several cards share an unconventional frame, keep name placement consistent across all of them. A player should not need to memorize your private art-direction document to evaluate the board.
Cube environments
Cube magnifies consistency problems because cards move through packs, sideboards, and different players’ decks. Apply one label standard across the entire Cube, not just the newest additions. Sleeves, insert construction, and card-name placement should remain consistent enough that drafters cannot identify test slots while cards are face down. The same principle supports a better MTG proxy Cube drafting environment.
Long-term test cards
Paper inserts are excellent for rapid iteration, but frequent changes can lead to creases, doubled inserts, and forgotten versions. If a card survives several deck revisions, replace the temporary slip with a cleaner dedicated playtest card. Players considering a repeatable batch can explore printed MTG proxies while preserving the same conspicuous label and disclosure habits. A cleaner component improves handling; it does not change the table-consent or event-policy boundary.
Borrowed decks, trades, and storage
Tell a borrower exactly which cards are unofficial and provide the same pregame script you use. Store retired proxies separately from authentic trade stock, preferably in a labeled box or binder section. Never rely on the next person noticing subtle print differences. The front label should make accidental misrepresentation difficult even after the card leaves the deck.
The final mixed-deck check
Before taking the deck to game night, confirm all six points:
- Every unofficial card has a conspicuous “PLAYTEST” or “PROXY” label on its front.
- Each card’s complete name and important game information are easy to read.
- Opaque sleeves and consistent backing prevent face-down identification.
- The deck has been checked for thickness, stiffness, wear, and protruding inserts.
- The number and nature of the playtest cards will be disclosed before shuffling.
- The deck will not be presented as legal for sanctioned play merely because its proxies are labeled.
Make the deck boring to administer
The best labeling system disappears into the game. Everyone can identify the cards, nobody can detect them in hidden zones, and the pregame conversation takes seconds rather than becoming the evening’s main event. Mark the fronts boldly, standardize the backs, disclose the count, and keep a rules reference nearby. If a card remains worth testing after several games, log the result and decide whether it earns a permanent slot. That is the point of a playtest card: useful evidence for the next deck version, not plausible deniability in cardboard form.