The Black Grimoire
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The Black Grimoire

Name your
commander.

A free Commander & Brawl deck builder, guided by patterns in over 7.0 million real decklists.

Build a deckPaste a deckDownload for Windows

Every card has a reason.
No account to build. No paywall. Only possibilities.

Browse by colour identity

Filter commanders by the colours you want to play.

Choose colours

From a name to a deck

Choose the legend that speaks to you. The grimoire studies the decks that came before, then gives every card its place.

  1. 1

    Pick a commander

    Choose a commander and a format: Commander (EDH), Brawl (Arena Historic Brawl), Standard Brawl.

  2. 2

    Set your pool and power level

    Use your collection or the full card pool. Commander bracket checks follow Wizards' official Commander Bracket rules.

  3. 3

    Get a deck with reasons

    Get a complete deck in 30–90 seconds, with a stated reason for every card.

See it work

A decklist you can inspect, from its mana curve to its game plan.

Detail of the Krenko deck result: mana curve, Deck Intelligence score, and enabler and payoff cards under How This Deck Wins
Krenko, Mob Boss · Detail from the builder result
  1. 1

    Read the mana curve

    See how the deck’s spells are distributed across mana values.

  2. 2

    Inspect Deck Intelligence

    Review the deck’s archetype and interaction & synergy score.

  3. 3

    Understand the game plan

    Trace how the deck wins through its enablers and payoffs.

Build your own deck Paste a deck into the optimizer
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In the margins

Tools for the deck you have in mind.

Builder

Every card explained.

Best deck

The strongest build from your collection.

Optimizer

Cuts and adds, 12 formats.

Commanders

Cards for your commander.

Deck catalogue

Real published decklists.

Collection

Build with cards you own.

The Black Grimoire in numbers

real decklists
7,023,156
Patterns from over 7.0 million decks
data sources
3
Moxfield, Archidekt, EDHREC
per build
30–90s
From commander to complete deck
builder formats
3
Commander, Brawl, Standard Brawl

Deck corpus as of

Common questions

See all questions
Is it free?Does it work for Brawl on Arena?Where does the data come from?

Found a wrong suggestion or missing card? Use the feedback button on any page, or the contact form.

Free for players

Every feature on The Black Grimoire stays free: the builder, optimizer, Deck Doctor, collection and decks are all uncapped. Best deck and the AI deck consultant need a free account; paid plans exist only to raise your monthly allowance of AI deck consults on Claude (Anthropic) and your daily allowance of best-deck runs — see pricing. The site also runs on donations and will carry limited, non-intrusive ads later.

Donate

Other ways to help

  • Share it with your playgroup or Commander Discord.
  • Send feedback — wrong suggestions and missing cards get fixed fastest when someone reports them.

The next page is yours.

Your commander. Your cards. A reason for every choice.

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