TLDR: In the proxy cards vs playtest cards briefing, the two terms overlap. A playtest card usually emphasizes experimentation: you are trying a card, mana base, or entire deck before making a lasting decision. A proxy usually emphasizes substitution: the stand-in represents a specific card you already intend to use. The same piece of paper can be both. What actually matters is whether it is readable, physically fair, accepted by the table, and permitted in the event.
I have seen lesser operatives spend twenty minutes debating terminology while a handwritten Forest labeled “Rhystic Study” quietly controlled the room. Do not let vocabulary compromise the mission. For casual Magic, identify what the stand-in represents, make it usable, and ask the other players before deployment. For sanctioned play, player-made stand-ins generally do not qualify as authorized cards.
Proxy cards vs playtest cards: the practical distinction
Magic players do not use “proxy” according to one universal community taxonomy. Wizards has acknowledged that players colloquially apply the word to a wide range of objects, from marked-up cards used for testing to counterfeits. The label alone therefore tells you little about purpose or acceptability. Wizards’ proxy policy explanation provides useful background on that distinction.
A practical working definition is simpler:
- Playtest card: a temporary stand-in used to find out whether a card or deck idea works.
- Proxy card: a stand-in used in place of a particular Magic card, often after the player has already chosen that card for the deck.
- Counterfeit: an imitation presented as though it were a genuine Magic card. It is not merely a polished proxy or a playtest card with good printing.
- Official substitute card: a Wizards-provided game component used under specific rules for certain double-faced cards. It is not a general-purpose community proxy.
- Tournament proxy: a replacement authorized and issued by a judge under narrow tournament circumstances, not something a player makes at home.
These categories describe purpose and context, not necessarily construction quality. A handwritten basic land can begin as a playtest card on Tuesday. If the decklist becomes settled and the same stand-in remains in a casual Commander deck, its owner may start calling it a proxy. The cardboard did not transform under moonlight. The mission changed.
Can one card be both?
Yes. Suppose you print a stand-in for Teferi’s Protection because you want to know whether your deck needs that effect. It is a proxy because it substitutes for Teferi’s Protection, and it is a playtest card because you are evaluating the choice. If testing proves that the card spends every game trapped in your hand, you remove it. Clean extraction.
The distinction becomes more useful when you consider four common situations:
| Situation | Useful label | What matters most |
|---|---|---|
| Trying one possible card for a few games | Playtest card | Fast construction and enough information to evaluate the card |
| Tuning a new deck or mana base | Playtest deck | Consistency, readability, and easy revisions |
| Keeping a chosen stand-in in a casual deck | Proxy card | Table approval, durable construction, and clear identification |
| Entering a sanctioned tournament | Authorized card question | The current tournament rules and the Head Judge’s decisions |
Do not treat “playtest” as a magic password that overrides a store, organizer, or table policy. Likewise, “proxy” does not automatically mean polished, permanent, deceptive, or forbidden everywhere. Ask what the specific environment permits.
When a handwritten basic land is enough
For a short experiment, a basic land with another card’s name written on it can be entirely functional. Wizards has itself described this as a common example of a player-made playtest card used before obtaining cards for sanctioned play. Its 2016 policy statement also said Wizards did not intend to police personal, noncommercial playtest cards used outside sanctioned events, including play in a store. That statement does not guarantee acceptance at every table or unsanctioned event; local policies still control the perimeter.
The handwritten method is best when you are changing cards frequently and everyone already knows the relevant text. It becomes inadequate when players must repeatedly search for the card, cannot see what permanent is on the battlefield, or mistake it for the backing card. A basic land named “The One Ring” but displaying none of the relevant text has created a briefing failure.
For smooth play, include the card’s name prominently and add the information players will need to make decisions:
- Mana cost and color identity cues where relevant
- Card type and subtype
- Rules text, including choices and restrictions
- Power and toughness for creatures
- Starting loyalty and relevant abilities for planeswalkers
- A clear visual distinction from tokens, emblems, and unrelated face-up cards
You do not always need every line of reminder text. You do need enough information for opponents to understand the game state without interrogating a database every turn. Readability outranks decoration during early testing.
Build stand-ins that do not become marked cards
A paper insert placed in front of a real card or spare common is a straightforward casual construction method. Use opaque sleeves, place every insert consistently, and check the deck from the back and edges. If one card is thicker, bowed, differently sleeved, or visibly carrying a slip of paper, it may be identifiable while face-down. That is an intelligence leak.
The tournament rules make the underlying fairness principle explicit: sleeves in a deck must be identical in size, color, texture, and wear, and features that let someone identify a card without seeing its face create marking concerns. Meeting those physical standards does not make a player-created proxy tournament legal, but the same principle is sensible for casual testing.
Use this construction check before shuffling:
- Sleeve the full deck in matching opaque sleeves.
- Use the same type of backing card behind every paper insert.
- Trim inserts so none protrude or bunch inside the sleeve.
- Place inserts in the same orientation.
- Shuffle, square the deck, and inspect its backs and edges under normal room lighting.
- Replace any sleeve or insert that makes a particular card identifiable.
For repeated testing, printed fronts save time and reduce rules-text errors. A consistent template also makes large changes easier to manage. The MTG proxy printing template guide covers size, margins, bleed, and PDF setup when the operation has advanced beyond marker-on-basic-land technology.
Choose construction quality according to the mission
There is no prize for overbuilding an idea you may reject after one game. Match the effort to how long the stand-in needs to survive.
- One-game experiment: a clearly labeled basic land or simple paper slip is usually enough if the table can read it.
- Several tuning sessions: use printed inserts with complete rules text and consistent backing cards.
- Established casual deck: prioritize durable, readable fronts and consistent sleeving.
- Large testing pool or repeated deckbuilding: organize printed stand-ins so cards can move between lists without creating identification problems.
Once a list has stabilized, professionally produced custom MTG proxy cards can reduce the cutting-and-labeling workload for an established casual deck. That is a procurement choice, not permission from the table or an exception to tournament rules. For broader background on how stand-ins fit Commander deckbuilding, see Steven Seagull’s guide to MTG proxies.
Casual table approval is a separate operation
In casual Commander, construction quality does not replace communication. A beautiful proxy may still be unwelcome in a particular group, while a crude handwritten playtest card may be accepted immediately. Tell the pod what you are using before the game and ask whether the store, organizer, or group has limits.
Keep the proxy conversation separate from the power-level conversation. The fact that a card is represented by paper does not tell anyone how strong the deck is. Explain unusual commanders, fast mana, compact combos, heavy tutoring, or other strategically relevant features just as you would with a deck made entirely from genuine cards.
A useful pregame briefing can be one sentence: “I am testing six printed stand-ins in this deck; they are readable and sleeved consistently. Is everyone comfortable with that?” If the deck also has an early deterministic combo, disclose that separately. Our full Commander proxy etiquette guide covers this conversation without requiring a hostage negotiator.
Sanctioned events have different rules
The Magic Tournament Rules effective February 27, 2026 state that authorized cards in sanctioned events must be genuine, regulation-sized Magic cards publicly released by Wizards. Cards that are not authorized game cards are prohibited. Consult the official Magic Tournament Rules and the event’s Head Judge rather than assuming that casual permission carries into sanctioned play.
A tournament proxy is a narrow exception controlled by tournament officials. Under those rules, a judge may create a proxy for an otherwise legal card—or an official substitute card—that can no longer remain in the deck without becoming marked. Players may not create their own tournament proxies, and the Head Judge decides whether one is appropriate. A home printer, confident handwriting, and a dramatic nod do not grant judicial authority.
Official substitute cards for double-faced cards are another distinct mechanism. They can represent applicable double-faced cards in hidden zones under the prescribed procedure, and the corresponding actual card must be available. They are official game components governed by tournament rules, not blank permission to substitute for any card.
Do not confuse player-made stand-ins with official Playtest Cards
Capitalization can change the briefing. Mystery Booster 2 contains official Wizards cards called “Playtest Cards.” These are intentionally unusual printed cards from that product, not homemade stand-ins for ordinary deck testing. Wizards’ release notes state that they are not tournament legal outside Mystery Booster Limited formats.
Therefore, “I am using a playtest card” might mean either “I wrote a card name on a basic land to test my deck” or “I have an official Mystery Booster Playtest Card.” Context prevents friendly confusion and unfriendly judge calls.
The final field checklist
Before using any stand-in, run this threat assessment:
- Purpose: Are you testing an uncertain choice or substituting for a settled card?
- Clarity: Can every player identify the card and read the information needed for decisions?
- Construction: Is it sleeved and backed consistently with the rest of the deck?
- Communication: Have you disclosed the stand-ins and asked what the table permits?
- Power: Have you discussed the deck’s actual speed and strategy separately?
- Event status: Is the game casual, unsanctioned, or sanctioned?
- Authority: If it is an organized event, have you checked with the organizer or Head Judge?
Mission conclusion
Use “playtest card” when experimentation is the important fact and “proxy card” when substitution is the important fact. Accept that ordinary player speech will blur the boundary. The same stand-in can serve both roles, and neither label settles whether it is acceptable in a particular game.
For early testing, start simple. Write clearly, include the necessary game information, use opaque matching sleeves, and ask the table. Upgrade the construction only when the deck survives contact with reality. In sanctioned play, leave player-made stand-ins out unless the Head Judge applies the tournament-proxy procedure. Clear card, fair construction, informed consent. Mission accomplished.