Terms of use

Rule Ø ("Rule Zero") is a free hobby project for Magic: The Gathering Commander players, run by Pjotr. Last updated 12 October 2026.

By invitation. Accounts are approved by hand and can be removed at any time.
No guarantees. The tool is provided as it is. It can be wrong, slow or offline, and data can be lost. The AI's advice and grades are opinions, not facts.
Be decent. Use it for your own decks. Don't try to break it, overload it, or get into other people's accounts. The AI has daily limits; don't work around them.
Your data. What you enter stays yours. See the privacy policy for how it is handled.
Card data and images come from Scryfall and other community sources. Rule Ø is unofficial Fan Content permitted under the Fan Content Policy. Not approved or endorsed by Wizards of the Coast. Portions of the materials used are property of Wizards of the Coast. ©Wizards of the Coast LLC.