TurnZero Log in

Closed beta for Commander brewers

Goldfish. Change cards. Run it again.

TurnZero plays your deck through thousands of opening turns, measures how its resources develop, and keeps each result with the exact deck version that produced it.

Log in to the closed beta

Invite-only access is arranged through participating Commander communities.

Illustrative comparison1,000 games each · through turn 6
Halsin + Feywild VisitorBefore and after two swaps
2 snapshots
First import More card access
Mean cards drawn per turnEach bar = one turn cycle
First import, turn 1: 1.03 cards drawn First import, turn 2: 1.06 cards drawn First import, turn 3: 1.12 cards drawn First import, turn 4: 1.20 cards drawn First import, turn 5: 1.34 cards drawn First import, turn 6: 1.65 cards drawn More card access, turn 1: 1.03 cards drawn More card access, turn 2: 1.07 cards drawn More card access, turn 3: 1.15 cards drawn More card access, turn 4: 1.25 cards drawn More card access, turn 5: 1.40 cards drawn More card access, turn 6: 2.20 cards drawn
Extra card access · T6
1.4→2.1
Below curve on 2+ turns
27%→18%
Interaction seen · T6
0.72→0.65

Example data for explanation only. Each version runs as its own batch.

Mana developmentExtra card accessLand-drop reliabilityInteraction seen

The brewing loop

One change should earn another run.

Keep the deck list, simulation, and comparison together. TurnZero records what changed, then shows how the resource measurements moved.

  1. 01
    Bring in the list

    Import from Archidekt, upload a text file, or paste the full deck list.

  2. 02
    Run the first simulation

    Choose a game count and turn limit, then save the report against that exact list.

  3. 03
    Edit inside TurnZero

    Try the swaps you were already considering. You choose the cards and the reason.

  4. 04
    Create a snapshot

    Name the new version so its list and future reports stay easy to identify.

  5. 05
    Run it again

    Use the same game count and turn limit for a clean before-and-after read.

  6. 06
    Compare the results

    Read each resource delta separately. Keep brewing when the evidence gives you a new question.

Repeat as you brew

A result is evidence for your next question, not a verdict on the deck.

Four separate measurements

You decide what the deck needs.

TurnZero reports strategy-independent resources. It does not combine them into a power score or prescribe card changes.

01

Mana development

See total mana capacity by turn against the natural one-land-per-turn curve, plus how often games fall below that curve on at least two turns after turn one.

02

Extra card access

See cards gained beyond the normal draw for each turn. The baseline stays visible, so the number does not hide what counts as extra.

03

Land-drop reliability

Separate consistent land drops from mana produced by rocks, dorks, rituals, and other sources.

04

Interaction seen

Count unique Interaction-role cards seen in hand over the run. This measures access, not whether casting one would be correct in a real pod.

Know the boundary

A strict goldfish. Your judgment.

TurnZero simulates your own deck. It does not predict multiplayer games, model politics or threat assessment, or decide whether a strategy is good.

For a fair read, compare reports with the same game count and turn limit, then decide which changes matter for your plan.

Read how the simulator works

TurnZero.
Know your deck before game night.