Free Commander deck builder & MTG collection manager
Commandarium is an online MTG deck builder for Commander (EDH) that starts with the collection you already have — import or scan your cards, build decks from them, and see what they are worth and what is still missing.
Commander deck builder
A complete, legal 100-card deck from the cards you already own — balanced, explained, ready to play.
Learn more →Collection import
Bring your MTG collection over from ManaBox, Moxfield, Archidekt, Deckbox or Delver Lens with one CSV file.
Learn more →Card scanner
Point your phone at a Magic card. The exact printing lands in your collection — recognized on your device.
Learn more →Collection value & prices
TCGplayer, Cardmarket and MTGO prices in 30 currencies, with foil prices and daily changes.
Learn more →AI deck upgrades
“Make it stronger” finds the cards your deck is missing, within your budget, and explains every pick.
Learn more →Deck sharing
One link shows your deck to anyone — with what they already own and what it costs them to build it.
Learn more →Build from what you already have
Step by step, for the jobs players bring to Commandarium most often.
Start from where your cards are
ManaBox collection to Commander deck
Already catalogued your cards in ManaBox? Import the CSV and build around what you own.
How it works →Delver Lens CSV to Commander deck
Scanned your cards with Delver Lens? Import the CSV and build a Commander deck from your scans.
How it works →MTG spreadsheet to Commander deck
Keep your cards in Excel or Google Sheets? Save the list as CSV and build from it.
How it works →Scan cards and start a deck
No digital collection yet? Scan a small stack and start building from it.
How it works →Build, check and buy
Choose a commander from your collection
Your next commander may already be in your binders. Explore the legendary creatures you own.
How it works →A deck from one binder or box
Turn one binder, one box or one pile of bulk into a complete Commander deck.
How it works →Upgrade a precon with your cards
Make a preconstructed deck stronger with the cards already sitting in your binders.
How it works →Check your deck’s ratios
Import a decklist and see its ramp, card draw and removal against their targets.
How it works →A shopping list from your collection
Only the cards your collection is missing for a deck — with today’s prices and the total.
How it works →Deck prices on Cardmarket
What a Commander deck costs in euros — and what it costs you after the cards you own.
How it works →Questions
Is Commandarium free?
Yes. The deck builder, the collection manager, the card scanner, prices and deck sharing are free, in your browser. The optional Plus subscription removes ads and the limit of 5 decks and 5 binders, and gives you more AI upgrade analyses.
Is it an EDH deck builder?
Yes — Commander and EDH are the same format. Commandarium builds and checks 100-card Commander decks: color identity, singleton, the banned list, partners and backgrounds.
Do I need to install anything?
No. Commandarium is a web app that runs online in any modern browser, on your phone or your computer. With a free account your collection and decks sync between devices.
Which collection apps can I import from?
ManaBox, Moxfield, Archidekt, Deckbox and Delver Lens — and any CSV file with a card name column, such as a spreadsheet saved as CSV. The steps for each app are in the guide How to import your MTG collection; ManaBox and Delver Lens have pages of their own.
Guides
Commander deck building know-how, written for players who build from what they own.
How many lands, ramp, draw and removal in a Commander deck
The numbers behind a deck that works: land count, ramp, card draw, removal, board wipes and creatures — by strategy.
Read the guide →Commander brackets and Game Changers explained
What the five brackets mean, which cards are Game Changers, how brackets replace the old power level scale — and which bracket your deck is in.
Read the guide →How to import your MTG collection
Export a CSV from ManaBox, Moxfield, Archidekt, Deckbox or Delver Lens and import it without losing printings, foils or binders.
Read the guide →How to upgrade a Commander deck on a budget
Where an upgrade pays off most, cheap upgrades that fit almost any deck, and what to cut first.
Read the guide →