Name: MTGArt
Author: Locke Werks

MTGArt

A rendering engine for custom cards, in one locked style.

Point it at a list of card names and it hands back a stack of print-ready proxies at 300 DPI with bleed. One master style prompt governs every card, so a sixty-card set looks like one artist made it over a single feverish weekend instead of forty strangers who have never met.

Local web app GPL-3.0 Node 18+

What it actually does.

You paste some card names. It asks Scryfall what those cards actually are, because it does not guess and it does not invent rules text. An art director pass reads each card and writes a scene description. The image model then paints the whole card, not just the art box, in whichever locked style you picked.

The result gets sliced into print-ready proxies at true card size, with bleed, at 300 DPI, so your home printer is out of excuses. Screen, trim and bleed PNGs come out alongside a per-card PDF.

Things that, against all odds, work.

One master style

A single style prompt rules every card, so your set looks like a set and not a twelve-car pileup of clashing nonsense assembled in the dark.

The card ships as structured data

Titles, type lines, rules text, loyalty abilities and mana pips all go to the model as markup rather than prose, so it reads them like a spec sheet instead of guessing at layout.

The text box holds up

Hand it a planeswalker with four loyalty abilities and it lays them out in tidy rows instead of a ransom note.

Print pipeline

Screen, trim and bleed PNGs plus a per-card PDF, at true card size and 300 DPI.

It spends your own.

MTGArt runs locally and talks directly to OpenAI with your own API key, set in the OPENAI_API_KEY environment variable. Locke Werks operates no service in this path and receives nothing: not your prompts, not your cards, not your key.

Budget roughly nineteen cents per high-quality card, a number that becomes a real problem the instant you think "let me just try one more style." There is a spend cap, and there is also a mode that ignores it entirely. Use that one responsibly, or do not. It is your money and your regrets.

A serious word, and this one is not a bit.

This software generates images that reproduce card names, rules text, mana symbols, and the card frame of Magic: The Gathering. Every one of those belongs to Wizards of the Coast. This is a personal art and playtesting toy. It is not affiliated with, endorsed by, or within a country mile of Wizards of the Coast, and it never will be.

Wizards owns that material and they are serious about protecting it. Free, non-commercial tools that did substantially what this one does have received cease-and-desist letters and disappeared inside of two weeks. This project can go the same way on any given Tuesday, with no warning and no appeal. If it is still here when you read this, treat that as luck rather than a promise.

Use it for personal, non-commercial purposes only. Cards for your kitchen table, your pod, your own amusement. That is the lane. Stay in it.
Do not build a business on top of this. Selling the cards, selling prints of them, or charging anyone to use a service that makes them is the fastest known way to turn a fun weekend project into a letter from a law firm and a frozen payment account. That is a favor, not decoration.
This is not legal advice. If you are seriously weighing anything commercial, pay an intellectual-property attorney for an hour of their time before you do a single thing, not after the letter arrives.

MTGArt

What it actually does.

Things that, against all odds, work.

It spends your own.

A serious word, and this one is not a bit.

Run it.