Proxic Deck Builder

A fast, portable desktop deck builder for Magic: The Gathering. Search the full card pool with rich live filters, build and analyze decks, compare printings side by side at full art, and print proxy sheets.

Windows desktop app (Python + Tkinter). No account, no telemetry; your decks and settings stay on your machine.

Download & run (Windows)

1. Download the latest Proxic_Deck_Builder-*-windows.zip from the Releases page.
2. Unzip it and keep the ProxicDeckBuilder folder together.
3. Run ProxicDeckBuilder.exe.

First-run Windows warning: the app isn't code-signed, so Windows SmartScreen may show "Windows protected your PC." This is expected for a new independent app. Click More info → Run anyway to start it. (SmartScreen stops warning once the app has been run a few times, or once signing is added.)

No Python required. The app is fully portable. It keeps its card database and your saved decks in its own folder and writes nothing to AppData or the registry, so you can copy the folder between PCs or run it from a USB stick.

Updating: when a newer release exists, a banner appears at the top of the window. Click Update and the app downloads and verifies the new version, then Restart now swaps it in and relaunches — your data\ folder (decks, database, images, settings) is preserved, so there's no re-download of card data. (The first launch of a freshly downloaded build may show the SmartScreen prompt again until the app is signed.)

On first launch it downloads current card data from Scryfall (a few hundred MB); after that it runs offline and refreshes on its own schedule.

Features

• Search the full card pool with live, contextual filters — colors, mana value, power/toughness, types, subtypes, keywords, formats, rarity, and more — each option showing how many cards still match your other filters.
• Deck building with mainboard and sideboard, quantities, and basic format-legality checks.
• Comparison view — line up multiple printings side by side at full art to pick your favorite.
• Proxy printing to PDF — pulls Scryfall's high-resolution card PNGs so printed cards stay crisp, laid out at the correct size with cut guides.
• Portable & private — everything lives in one folder; nothing leaves your machine except card-data downloads from Scryfall.

Screenshots

Search and browse the full card pool, with a live gallery preview and a deck panel showing composition, mana curve, and draw odds:

The full-art results gallery, with an adjustable card size:

Building a deck, with live mana curve, opening-hand draw odds, a sample hand, and format-legality checks:

Proxy sheets exported to PDF — the app pulls Scryfall's high-resolution card PNGs so the printed cards stay crisp, laid out at the correct size with cut guides for trimming:

Build from source

Requires Python 3.11+.

pip install .
python -m mtgdb

To build the standalone Windows executable yourself, run build_windows.bat. It creates an isolated build environment, runs the project's checks, and produces the portable app in dist/ProxicDeckBuilder/.

The test suite is a set of standalone scripts under tests/. For fast local iteration, run them all in parallel:

python tests/run_tests.py

It prints a PASS/FAIL summary and the full output of any failure. (The build script and CI run the same tests one at a time for deterministic, early-exit per-file attribution.)

Card data & legal

This is unofficial, fan-made software, provided as-is. Nothing here is legal advice, and you are responsible for how you use it.

Card data and imagery come from Scryfall. Magic: The Gathering, card names, and card art are the intellectual property of Wizards of the Coast; this project claims no ownership of them.

About printing proxies: this tool can print card images for personal, non-commercial use — playtesting and casual games, ideally with cards you own. Please don't sell printed cards, misrepresent them as genuine, or use them in sanctioned tournaments or any venue that prohibits proxies. Wizards' Fan Content Policy does not authorize creating proxy cards, so personal proxies are strictly between you and the law in your area — use this feature responsibly and at your own risk.

Proxic Deck Builder is unofficial Fan Content permitted under the Fan Content Policy. Not approved/endorsed by Wizards. Portions of the materials used are property of Wizards of the Coast. ©Wizards of the Coast LLC.

License

Released under the MIT License — do whatever you like with the code, just keep the copyright notice. The license covers this project's own source only, not Magic: The Gathering card data or imagery (see above).