How to Goldfish a Commander Deck: Test Your EDH Deck Before Game Night

Your Commander deck looks perfect on paper. It has enough lands, ten ramp cards, several powerful finishers and a commander that ties everything together. But when you sit down for your first game, you spend three turns doing almost nothing while your opponents establish their strategies.

That’s exactly the kind of problem goldfishing can reveal before game night.

To goldfish a Commander deck, shuffle your 99-card library, draw a seven-card opening hand and play through your first five or six turns without an opponent. Make land drops, cast spells and track when your commander becomes playable. Repeat the process with different opening hands to identify problems with your mana, card draw and overall consistency.

You can do this with physical cards or an online Commander playtester. The goal isn’t to prove that your deck can win against imaginary opponents. It’s to find out whether your deck can reliably execute its own strategy.

Here’s a practical testing method you can use before buying upgrades, changing your mana base or taking a new deck to your next Commander night.

What Does Goldfishing Mean in Commander?

Goldfishing means playing a Magic deck against an imaginary opponent who doesn’t interact with you. You draw cards, play lands, cast spells and advance through turns as you normally would, but nobody removes your creatures, counters your spells or attacks you.

The name comes from the idea that your opponent offers about as much resistance as a goldfish.

In Commander, this kind of testing is particularly useful because every deck contains 100 cards, including its commander, and most nonbasic cards are restricted to a single copy. That makes individual opening hands and draw sequences vary considerably.

Goldfishing helps answer several practical questions. Can your deck consistently make its first three land drops? How often does your commander become playable? Are your early cards contributing to the main strategy, or are you holding expensive spells with no way to cast them?

It can also reveal whether your supposed win conditions actually work together. A deck may contain several powerful cards without reliably assembling a meaningful battlefield.

However, goldfishing doesn’t measure how your deck performs against removal, counterspells or multiplayer politics. That requires real games.

How to Goldfish a Commander Deck Step by Step

You don’t need specialized software or a spreadsheet to begin testing. A physical deck, a playmat and somewhere to record a few observations are enough.

For a typical four-player Commander simulation, follow the normal multiplayer mulligan procedure, including the free first mulligan.

Step 1: Shuffle Your Deck and Draw Seven Cards

Place your commander in the command zone, shuffle the remaining 99 cards and draw seven.

Evaluate the hand as though you were preparing for a real multiplayer game. Look for appropriate colored mana, early spells and a realistic route toward casting your commander.

If your hand is clearly dysfunctional, take a mulligan using the normal rules. Don’t keep a bad hand simply because you know nobody will punish you during the simulation.

Your first mulligan is free in multiplayer Commander. Additional mulligans require you to put the appropriate number of cards on the bottom of your library when you keep.

If you need help evaluating opening hands, our Commander Mulligan Guide explains how to recognize a functional starting seven.

Step 2: Play Your First Three Turns Normally

Play through the opening turns as though you’re participating in a real game.

Make legal land drops, cast spells using the mana you have available and respect summoning sickness, timing restrictions and any other relevant rules.

Don’t give yourself free mana, search for a convenient card without an effect allowing it or assume that you’ll draw the land you need next turn.

Pay attention to how quickly your resources develop. A hand containing Arcane Signet and three lands may provide an excellent start, while one containing Sol Ring but no usable colored mana can still be awkward.

Record whether you successfully made your first three land drops and whether you had a meaningful play before turn three.

Step 3: Continue Through Turns Five or Six

Once your opening development is established, continue the simulation into the middle turns.

This is where you can evaluate whether your deck transitions from mana development into its actual strategy.

For a Dragon deck led by Lathliss, Dragon Queen, that means checking when Lathliss becomes castable and whether you can follow her with another Dragon.

A deck built around Giada, Font of Hope should establish Angels relatively early, while Ghalta, Primal Hunger benefits from developing creature power that reduces her casting cost.

Don’t simply record the first turn your commander could enter the battlefield. Also consider whether casting it would leave you with useful follow-up plays.

Step 4: Record Your Results

After the simulation, write down what happened before shuffling again.

You don’t need dozens of statistics. A few consistent observations are much more useful than a complicated tracking system you abandon after two attempts.

Repeat the entire process with another shuffled hand. The objective is to identify recurring patterns rather than judge your deck by one unusually good or bad sequence.

How Many Opening Hands Should You Test?

Start with 20 opening hands and play at least five of them through turn six. This is a practical first-pass testing routine, not a statistical guarantee.

Twenty hands can reveal obvious problems, such as frequently drawing too few lands or holding several expensive spells without early acceleration.

Playing five complete sequences adds another perspective. You may discover that your deck starts well but has difficulty transitioning into its main strategy.

If the results are inconsistent or you’re comparing two similar versions of a deck, increase the sample to 30–50 opening hands and more full simulations.

Importantly, a small sample doesn’t establish a precise probability that your deck will perform in a particular way. Commander has considerable variation, and multiplayer games introduce additional factors.

Treat these tests as diagnostic evidence rather than proof of a specific win rate.

What Should a Good Goldfish Test Look Like?

A successful test depends on what your commander is trying to accomplish.

A fast aggressive deck may want to establish pressure during the first two turns. A casual control deck might prefer reliable mana development while keeping interaction available, and a big-mana strategy may be perfectly comfortable casting its commander later.

For a balanced casual Commander deck, use these checkpoints as a starting framework.

These aren’t mandatory milestones. Some commanders cost two mana and should generally arrive much earlier, while others cost seven or eight and demand additional setup.

The important issue is whether your actions are productive relative to your deck’s plan.

A deck consistently casting spells one turn later than intended may have a mana problem. A deck casting everything on schedule but accomplishing very little may instead have too many low-impact cards.

Three Problems Goldfishing Can Reveal

The most valuable results usually involve patterns that aren’t obvious when looking at a decklist.

Your Mana Base Is Less Reliable Than Expected

Imagine your opening hand contains three lands, but two enter tapped and the third doesn’t produce the color required by your early spells.

You technically have three lands, yet your first turns may still be awkward.

This is why testing color availability matters just as much as counting lands. A deck can consistently draw mana sources while still struggling to cast its spells on time.

If several simulations reveal the same problem, review your tapped lands and colored mana requirements before purchasing additional high-cost spells.

Our Commander Mana Base Upgrade Guide covers inexpensive ways to improve land quality and fixing.

Your Ramp Isn’t Arriving Early Enough

Suppose your deck contains twelve ramp cards, but most cost three or four mana. Your total count looks healthy, yet your commander consistently arrives later than expected.

Goldfishing reveals this difference immediately.

Replacing a slower accelerator with Mind Stone, Nature’s Lore or another efficient option can sometimes improve the opening turns more than adding additional ramp.

Our Commander Ramp Guide explains how to balance mana rocks, land ramp and cost reduction for different strategies.

You Produce Mana but Run Out of Spells

The opposite problem is also common. Your deck produces plenty of mana, but by turn five your hand is empty and you have no meaningful way to use it.

Goldfishing can help identify whether this is caused by an excessive number of ramp pieces, insufficient card draw or a commander that needs additional support.

Cards such as Beast Whisperer and Guardian Project can provide repeatable advantage in creature-heavy decks, while other strategies may prefer immediate draw spells.

If this pattern appears frequently, review the balance between ramp and card advantage rather than adding another expensive finisher.

Our Commander Card Draw Guide explains the different types of card advantage and how many sources a typical casual deck may need.

How to Goldfish Different Commander Strategies

The same testing method applies to most decks, but the success criteria should change according to the commander.

A deck focused on combat doesn’t develop in the same way as a sacrifice engine or a control strategy.

Big-Creature and Dragon Decks

For decks led by Lathliss, Dragon Queen or Ghalta, Primal Hunger, track how quickly you can deploy your major threats.

Lathliss wants enough acceleration to cast her and still follow up with additional Dragons. Ghalta wants a combination of green mana and creature power that reduces her generic casting cost.

Test whether your ramp cards contribute to those plans and whether your opening hands contain too many expensive creatures competing for the same turn.

Token and Sacrifice Decks

A sacrifice deck needs more than a collection of individually powerful cards.

For example, Ghoulcaller Gisa wants creatures with useful power, opportunities to activate her ability and ways to benefit from the resulting Zombie tokens.

Goldfishing can reveal whether you’re consistently assembling those pieces or drawing sacrifice payoffs without enough creatures to support them.

You should also track whether the strategy remains productive when your commander isn’t on the battlefield.

Control and Spellslinger Decks

Goldfishing is less revealing for reactive decks because their best spells often respond to an opponent.

A hand containing Counterspell, Swords to Plowshares and other interaction may look unproductive in a solo simulation despite being excellent during an actual multiplayer game.

For those decks, focus on mana development, colored mana availability and access to card advantage. Don’t penalize a control list simply because it doesn’t establish a large battlefield by turn four.

Real games are essential for evaluating whether the interaction package is actually effective.

Best Free Tools to Goldfish a Commander Deck Online

Physical goldfishing works perfectly well, but online tools make it easier to repeat tests without shuffling.

Several browser-based playtesters allow you to import decklists, draw opening hands and simulate turns.

Some tools support more advanced interactions, but the basic process remains the same: import your deck, draw seven cards and play through your opening turns.

Choose whichever interface makes repeated tests easiest. The tool itself matters less than recording consistent observations.

You can also start with a preconstructed deck from our PreconForge Commander Precon Database, then export its decklist for use in a compatible deckbuilding or playtesting tool.

How to Compare Your Deck Before and After Upgrades

Goldfishing becomes especially useful when you’re deciding whether a proposed upgrade actually improves your deck.

Suppose you want to replace three expensive creatures with two cheaper ramp spells and one card-draw engine.

Test the original list first, recording opening hands and commander availability. Then make the three changes and repeat the same process with new randomized hands.

Because you’re drawing different hands each time, a small improvement in a handful of tests doesn’t prove the updated list is objectively stronger. You’re looking for meaningful and recurring changes in how the deck develops.

A simple comparison might look like this:

Avoid changing twenty cards at once. When you make too many simultaneous modifications, it’s difficult to identify which ones actually helped.

Our How to Upgrade a Commander Precon Guide explains how to prioritize the first ten replacements without losing the original deck’s identity.

What Goldfishing Cannot Tell You

Goldfishing is useful, but it has one enormous limitation: your imaginary opponents don’t fight back.

A deck may consistently produce an impressive battlefield by turn five when nobody removes anything. That doesn’t mean it can survive a real table where opponents cast board wipes, counter your commander or interrupt critical combinations.

The same applies to win conditions. An infinite combo that works in isolation may be vulnerable to common interaction, while a creature army that looks lethal during goldfishing may struggle against blockers.

Goldfishing also doesn’t measure threat assessment or multiplayer politics. Those decisions often determine whether a powerful Commander deck actually wins games.

After confirming that your deck develops reliably, play several real games against opponents with appropriate power levels.

Pay attention to whether your strategy survives removal, whether your interaction is sufficient and whether your win condition remains effective under pressure.

If the deck feels slow despite performing well during solo tests, our How to Fix a Slow Commander Deck offers a broader diagnostic approach.

PreconForge Verdict: Test Before You Buy

Goldfishing is one of the simplest ways to improve a Commander deck without immediately spending money on new cards.

Start by drawing twenty opening hands, then play at least five realistic sequences through turn six. Record your land drops, mana acceleration, commander availability and moments when your deck stops making productive plays.

Use those results to identify recurring weaknesses. A deck that misses land drops may need a better mana base, while one that develops mana but runs out of spells may need additional card advantage.

Most importantly, remember that a strong goldfish performance isn’t the same as a strong multiplayer performance. Use solo testing to establish consistency, then rely on real games to evaluate interaction, resilience and your ability to win.

Our recommendation: Test your deck before buying expensive upgrades, change only a few cards at a time and compare the results. The best Commander improvements often come from understanding why a deck struggles rather than adding another powerful staple.