Have the conversation before shuffling
Proxy etiquette in casual Magic is mostly about avoiding surprises. Before decks are presented and opening hands are drawn, say that your deck contains proxies and give the table enough information to decide whether everyone is comfortable. That short conversation is usually more useful than trying to argue about proxies after a game has already started.
Be specific when it matters. “I have three proxies for cards I own in another deck” communicates something different from “this list is mostly proxied so I can test it.” Neither statement automatically tells the table how strong the deck is, which is why proxy disclosure and power-level discussion should be treated as separate topics.
Explain what the deck is trying to do
A proxy does not make a deck competitive by itself. A proxied Command Tower is not the same table concern as a fast mana package supporting an early combo. Tell the group what kind of game your deck is built to play.
Useful details include whether the deck has efficient tutors, free interaction, deterministic combos, mass land destruction, or a plan that can win very early. You do not need to reveal every card. The point is to help everyone choose decks that are likely to create the kind of game the table wants.
If you use high quality Magic: The Gathering proxy cards, do not assume good print quality removes the need for disclosure. A convincing custom print is still not an officially printed tournament-legal Magic card.
Keep the board easy to understand
Readability is part of etiquette too. Commander boards become complicated quickly. Players should not have to stop every turn to ask what a blurry card represents. Use proxies with clear names, mana costs, rules text, power and toughness where relevant, and recognizable card orientation.
Custom art can be fun, but the card should still communicate its game object clearly. This matters most for commanders, permanents with activated abilities, and cards that remain on the battlefield for several turns. If a proxy uses radically different art or layout, be ready to name the original card without making opponents decode it.
Respect the table’s answer
Some groups welcome proxies freely. Others prefer them only for testing, cards already owned, or casual games outside sanctioned events. A local store may also have rules for particular events. If the table says no, the practical response is to switch decks or use a legal alternative rather than turn the pregame conversation into a debate.
A simple checklist works well: disclose the proxies, describe the deck’s strength and major play patterns, confirm the group is comfortable, and keep every card readable. Good proxy etiquette is less about proving a universal rule and more about making sure four Commander players sit down with compatible expectations.