Collection Deck Builder

Builds a Commander deck from the cards you own in ManaBox. Your collection stays in your browser; only card IDs go to Scryfall for lookups, and card names go to Commander Spellbook to find combos.

Saved decks

Your collection

Your collection ·

Drop your ManaBox export here, or click to choose it

In ManaBox, export your collection as a CSV file. It stays in your browser.

Binders to use

Turn off any binder that is not free for new decks, such as "cards in use".

Adjust your collection

Remove cards you don't really have, add ones your export is missing, or take a whole deck list out at once. Basic lands are always unlimited.

Your changes

More options

Avoid cards already in my saved decks (one copy each is subtracted from what you own)

Combos

Most combos per deck

Only combos whose cards suit the commander are added; the rest are listed on the deck's Combos tab.

Combos load after your collection.

For testing

Builds a deck for 30 of your commanders and lists anything that looks wrong.

Combo server

Only for a copy of this page hosted on a website: Commander Spellbook and EDHREC need a relay address there. Leave it empty when you run the page with serve.py.

Commanders

Commanders you don't own yet that your collection could build a strong deck for. The app checks the most popular commanders on EDHREC in your colors, builds a sample deck for each from your cards, and lists the best ones.

Partner

Themes found in this commander's text. Click to turn one off or on:

Export ▾

Mana curve

Tick a card as you pull it from your binders. "↻ swap" replaces a card with the best match you own (you can undo it). After building a real deck, move its cards into your "cards in use" binder in ManaBox and re-export, so they are not picked again.