License

Premodern Mana Sources. Copyright 2026 Squee's House of Pizza. All rights reserved except as granted below.

This project has two parts, under two different licenses.

The data — Creative Commons Attribution-ShareAlike 4.0

The hand-classified card data, meaning the card files and the reasoning recorded with each card, is licensed CC BY-SA 4.0. You may share and adapt it, including commercially, on two conditions.

Attribution. Credit "Premodern Mana Sources by Squee's House of Pizza," link back to the project, and note if you changed anything.
ShareAlike. If you build on the data, you must release your version under this same license. You cannot take this data into a closed or proprietary tool.

The code — source-available, non-commercial

The application code, meaning the calculator page, the build scripts, and the embed files, is source-available. You may read it, run it, fork it for your own non-commercial use, and learn from it.

You may not sell it, host it as a paid or ad-supported service, or ship it inside a commercial product without written permission from the copyright holder.

Not covered

Magic: The Gathering, card names, and card text are property of Wizards of the Coast. This is unofficial fan content, not affiliated with or endorsed by Wizards. Card data is sourced from Scryfall under their terms. Frank Karsten's probability tables are his work, cited and used as published reference.

This page is the readable summary of the project's license. The authoritative text lives with the source of record.