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.
Why ManaBuilder?
The smartest way to turn your card collection into winning decks
Synergy detection
A thousand-card collection has combos in it that no human is going to find by flipping through binders. Our AI checks your cards against each other and surfaces the interactions — creature-type overlaps, spell chains, that enchantment you forgot you owned.
Every major format
Standard, Modern, Commander, and Vintage. Legality is checked automatically against current banned and restricted lists, so nothing in your deck gets you sent back from the tournament desk.
Built from what you own
Most deck builders assume you'll buy whatever the list demands. We work the other way around: your collection first, purchases only if you ask for suggestions.
A strategy guide with every deck
Win conditions, key cards, what a good opening hand looks like, and a sideboard plan. You get a deck you understand, not just a list to sleeve up.
Popular Formats
ManaBuilder generates legal, optimized decks for every major format
Standard
Standard is the most accessible competitive format, using only cards from the last three years of sets. One rotation happens each year - the next is January 1, 2027 - keeping the metagame fresh and the barrier to entry low. Perfect for newer players who want a balanced, evolving environment.
Read format guideModern
Modern includes cards from 8th Edition onward, offering a deep card pool and diverse archetypes. It rewards mastery and lets you invest in a deck that stays legal indefinitely - ideal for players who want long-term value.
Read format guideCommander / EDH
Commander is the most popular casual format, featuring 100-card singleton decks led by a legendary creature. It's built for multiplayer games and creative self-expression, making it the social heart of Magic: The Gathering.
Read format guideLearn to Build Better Decks
Free guides written for every skill level
How to Build a Magic Deck
A complete walkthrough of deck construction: choosing a strategy, picking your colors, balancing your mana curve, and finalizing your 60-card or 100-card list.
Read guideHow to Build a Commander Deck
The step-by-step EDH build: pick your commander, stay inside its color identity, and fill the 36-38 land, 10-12 ramp, 10 draw, 10 removal template.
Read guide60-Card Deck Secrets
Learn the Rule of 9, optimal land counts, and sideboard strategies that separate casual builds from tournament-ready 60-card decks.
Read guideMTG Colors Explained
Understand the five colors of Magic - their philosophies, strengths, weaknesses, and how to combine them for powerful multicolor strategies.
Read guideMTG for Beginners
New to Magic: The Gathering? Start here for a friendly introduction to the game's rules, card types, phases, and your first steps toward building a deck.
Read guide