ManaBuilder is an AI-powered deck building tool for Magic: The Gathering. You upload your card collection, set your preferences - format, colors, playstyle - and our AI generates a complete, optimized deck list using the cards you already own.

How does the AI deck builder work?

After you upload your collection via CSV, you choose a format (Standard, Modern, Commander, etc.), select your preferred colors and playstyle, and hit generate. The AI analyzes every card in your collection for synergies, evaluates the mana curve, ensures format legality, and outputs a full deck with a strategy breakdown.

What MTG formats are supported?

ManaBuilder focuses on the four most-played constructed formats: Commander (EDH), Standard, Modern, and Vintage. The AI validates every suggested card against the format's banlist, restricted list, and current legal card pool - including the newest sets like Secrets of Strixhaven and Marvel Super Heroes - so you never end up with an illegal deck.

Do I need to buy new cards?

No. By default we only use cards you already own. If you want upgrade suggestions, you can turn those on — but the whole point of ManaBuilder is finding the decks already hiding in your collection.

Yes - you can upload a collection and build decks on a free account with free credits. That's not a trial; it's the product. Free credits cover Fast builds. Deep builds, which read your whole color pool with a heavier model, run on purchased credits.

The AI Magic: The Gathering Deck Builder

Upload your collection. Tell us how you like to play. Get back a legal, tuned deck with a strategy guide — usually in about five minutes.

manabuilder.com/suggestions

Tatyova's Boundless Horizon

100 cards · Simic ramp value

Commander

1xTatyova, Benthic DruidLegendary Creature

1xCultivateSorcery

1xOracle of Mul DayaCreature

1xRampant GrowthSorcery

1xMystic RemoraEnchantment

1xHedron ArchiveArtifact

8xForestBasic Land

Mana Curve

Strategy

Ramp into extra land drops early, then convert each one into cards with Tatyova. Hold counterspells for the turn you take over the game with a big draw engine.

Format legality and color identity verified

How It Works

Three simple steps to your next winning deck

Upload your collection

Export a CSV from ManaBox, Moxfield, or any tracker app and drop it in. We'll catalog every card and keep quantities straight.

Tell us how you play

Format, colors, and playstyle. Fast and aggressive? Grindy value? All counterspells, all the time? That's the brief our AI builds to.

Get Your Deck

A complete, format-legal list built around cards you own, with an honest explanation of why each card made the cut and how to pilot the thing.

Your next deck is already in your box.

Create a free account, upload your cards, and see what you can build tonight.

The AI Magic: The Gathering Deck Builder

How It Works

Upload your collection

Tell us how you play

Get Your Deck

Your next deck is already in your box.

Why ManaBuilder?

Synergy detection

Every major format

Built from what you own

A strategy guide with every deck

Popular Formats

Standard

Modern

Commander / EDH

Learn to Build Better Decks

How to Build a Magic Deck

How to Build a Commander Deck

60-Card Deck Secrets

MTG Colors Explained

MTG for Beginners

Frequently Asked Questions