MTG Proxy Playtesting: How to Test a Deck Before You Buy It
MTG proxy playtesting is the cheapest way to find out whether a deck actually works before you spend real money on it. Most Commander lists are not discovered in one sitting. You test a shell, notice it folds to the wrong creature deck, swap the interaction package, retest, and land somewhere you could not have reached by buying the cards first. The list we costed for this guide is a real 100-card Atraxa, Grand Unifier Commander deck — 36 unique card names, priced live on Scryfall — and it comes to US$197.34 in paper. Proxied at the official 100-card tier it costs US$80.00. And if you are still early in the tuning process, the 12 cards that do 80% of the work cost US$19.20.
This guide covers the three playtesting methods and when each one is the right call, the real cost of a Commander list in 2026, how to build a proxy playtest set that you can swap as the deck changes, and what a proxy genuinely cannot tell you.
| 📋 Table of Contents | |
|---|---|
| 1. | The Three Ways to Playtest a Deck |
| 2. | What a Commander Deck Actually Costs in 2026 |
| 3. | The 12-Card Proxy Starter Method |
| 4. | How to Actually Run the Session |
| 5. | The Bottom Line |
The Three Ways to Playtest a Deck
Most players think playtesting means paper or nothing. It does not. There are three methods, and they answer different questions.
1. Playtesting with proxies. You print the actual cards and play a physical game. This is the only method that tests the things that actually break a deck in real games: whether the ramp sequences work under pressure, whether you can find your third land on turn four, whether the shuffle feels right in hand. It also tests your ability to pilot the deck, which no software will ever tell you.
2. Playtesting on Magic: The Gathering Online. MTGO gives every new account roughly 3,000 cards for free, plus five ready-to-play decks, and supports multiplayer Commander on a basic account. The paid Account Upgrade is a one-time US$4.99 and pushes the collection above 9,000 cards. It is the fastest iteration loop in Magic — no printing, no waiting, and the card pool is complete for every format. Its weakness is that it tests the list, not the feel.
3. Playtesting on Magic: The Gathering Arena. Arena is free to download and gives you starter decks plus a wildcard system. It covers Standard, Historic, Pioneer, Alchemy, and Brawl. It is the best option for testing a Standard or Pioneer shell, and it is the wrong tool for Commander — there is no Commander event ladder to test against, and the crafting economy punishes exactly the expensive staples a Commander list is built from. Budget analysis puts a full wildcard craft for a Standard list around US$110 and Historic around US$140.
The practical rule: use digital playtesting to get a list to roughly 80%, then spend proxies on the last 20% — because the last 20% is where you test the actual game.
What a Commander Deck Actually Costs in 2026
Here is the honest number, not the scary one. The list below is a real 100-card Commander deck built around Atraxa, Grand Unifier with a proliferate and lifegain shell. Every price was pulled live from Scryfall on the day this was written.
Those ten lines are the deck’s expensive core. The other 26 card names are lands, mana rocks, and cheap interaction, and they add up to almost nothing — basics come in at US$0.10 to US$0.49, Stormcarved Coast is US$2.79, and Arcane Denial is US$2.21.
That structure is the single most useful thing to understand about Commander economics: the cost is concentrated, not spread out. A handful of cards carry most of the bill. When you price a 36-name deck and get to US$197, it is not because you picked badly — it is because eight names are doing the expensive work.
The 12-Card Proxy Starter Method
Here is the method that gets the most value per dollar spent, and it is the one we recommend to anyone who does not already own a Commander deck.
Split your list into what needs testing and what does not.
Proxy these 12 cards — the ones where a mistake is expensive and where the card’s identity actually matters to how the deck plays:
Skip the rest of the non-basics. Pongify, Counterspell, Arcane Denial, Stormcarved Coast, the mana rocks — these are US$2 to US$4 cards that most players accumulate for free out of draft pools, and at that price the proxy savings are negligible.
Twelve cards falls in the 1-18 tier at US$1.60 per card — US$19.20 total. That single order buys you every card in the deck whose cost actually stops you from testing, and you can reorder it three times for less than the paper price of the deck you are tuning.
The same list in paper is US$112.50 for those twelve cards alone. You are deciding whether a US$19.20 proxy order is acceptable friction for testing a US$112.50 decision.
When to Promote From 12 to 100
Promote to the full 100-card proxy set when one of these happens:
1. The shell works. You have won at least three games and lost to something other than a ramp screw. Now the details matter. 2. You are testing against a real opponent’s collection. If your pod owns a cEDH deck worth US$3,000, you are not stress-testing anything with 12 proxies — you are just losing. 3. You need to test the mana base. Whether your land drops align is only answerable with the full 36 lands in the deck, and land is where most Commander decks quietly fail.
The full 100 cards sit in the 91-198 tier at US$0.80 per card — US$80.00 total. Against the US$197.34 paper price, that is a saving of US$117.34, or 59.5% — and the proxies stay useful as a second deck for every list you build afterwards.
- Atraxa, Grand Unifier x1
- Birds of Paradise x4
- Luminarch Ascension x1
- Sneak Attack x1
- Tamiyo’s Safekeeping x2
- Command Beacon x1
- Cathars’ Crusade x1
How to Actually Run the Session
A proxy deck in your hand still needs a process, or you will spend an hour shuffling and never learn anything.
Before the session: write the list down. Every playtest deck should exist as a text file or a link before the cards arrive. If you cannot write the list out, you do not have a list — you have a pile.
Shuffle like it matters. Bridge-shuffle the deck at least ten times before the first game, and do it every game after. A 100-card proxy deck on 350gsm blue-core cardstock shuffles into about the same block as the real thing, and you want your shuffling to be realistic, not performative.
Play five games minimum. One game is a story. Five games is a pattern. Most Commander lists need ten to fifteen games before the win rate means anything, so plan on at least two sessions before you decide the deck is broken.
Write down what actually beat you. The useful note is not “I lost.” It is “mulliganed to five on turn two against discard” or “never resolved a threat before turn six.” Those two notes tell you exactly which cards to add to your next proxy order.
Change one thing at a time. If you swap a ramp package and three interaction spells between sessions, and the deck improves, you have learned nothing about which change worked. One variable per iteration is the whole discipline.
What Proxies Cannot Tell You
Honesty about the limits matters more than overselling the method. A proxy deck will not tell you:
Everything else — sequencing, mana math, card advantage, whether the deck has a plan — a proxy deck tests exactly as well as a paper one.
- Whether you draw the fifth land on turn four. Proxies have identical faces, but your shuffle technique and deck-tracking habits are what you are actually testing here.
- Judge-call edge cases in a sanctioned event. If your eventual goal is a trophy, the final deck should be paper. Playtest with proxies, buy the final list in paper.
- How a foil reads under tournament lighting. Irrelevant to gameplay, worth knowing if you care about the finished deck.
The Bottom Line
Playtesting is not an optional extra step between deciding on a deck and buying it. It is the part where you find out the deck you designed is not the deck you want to play. The math above is the whole argument for doing it with proxies.
A full proxy Commander deck costs less than most players spend on a single box of sealed product, and it never goes out of print. The 12-card starter gets a brand-new player from “I have an idea” to “I have tested it” for the price of a takeaway meal.
Related Reading
- The Complete MTG Proxy Guide 2026 The pillar hub for every proxy topic: legality, costs, quality, formats, storage, and etiquette in one place.
- MTG Proxy Decision Guide: What to Proxy and What Not to Proxy A four-tier priority framework for deciding which cards in a deck are worth proxying and which are cheaper to buy outright.
- MTG Proxy Prices 2026: How Much Do MTG Proxies Cost? The full quantity-tier table behind the US$80 Commander deck figure, plus what proxied Commander, cube, and staple packages actually cost.
- How to Build Your First Commander Deck with Proxies The beginner path: pick a commander, assemble a 99-card list, and know what a playgroup expects the first time you sit down.