Terms of Service
Effective date 2026-09-06
The Black Grimoire is provided free of charge, as-is, with no warranty of any kind. Deck suggestions are generated from a statistical model and a rule-based synergy graph over public decklist data, so they are not guaranteed to be optimal, legal in every format, or accurate at every moment the underlying card data changes.
Use of the service
You may use the builder, catalogue, and collection viewer for personal deck building at no cost. Automated scraping of this site, or request volume against the build or feedback endpoints beyond normal personal use, may be rate-limited or blocked without notice to keep the service usable for everyone else.
No accounts, no guarantees
Because no account is required, there is no persistent server-side record of your decks or collection tied to you. Data stored only in your browser is your responsibility to back up; the developer cannot recover it if it is lost, and there is no restore or export tool beyond what the collection page provides.
Accuracy and liability
Card legality rules, prices, and availability change over time, and while the underlying card database is refreshed regularly, it can lag behind the newest official rulings or bans. The developer is not liable for any loss arising from reliance on a build, an export, or an analysis produced by this site.
Wizards of the Coast
The Black Grimoire is unofficial Fan Content permitted under the Fan Content Policy and is not approved, endorsed, sponsored, or specifically approved by Wizards of the Coast. "Magic: The Gathering" and related marks are trademarks of Wizards of the Coast LLC, used here for identification purposes only. See the site footer for the full notice.
Changes
These terms may change as the site adds features such as advertising or new formats. Continued use of the site after a change is published means you accept the updated terms, and the effective date at the top of this page will move forward whenever that happens.