Terms of Service | Manamancer

Terms of Service

Last updated: September 15, 2026

These Terms of Service ("Terms") govern your access to and use of Manamancer (the "Service"), a web application for building and refining Magic: The Gathering decks across 14 supported formats, with AI features limited to Commander (EDH), operated by Manamancer ("we", "us", "our"). Manamancer is operated as a sole proprietorship established in the Province of Québec, Canada. The operator's full legal name and business address are available on request from support@manamancer.com. By creating an account or otherwise using the Service, you agree to be bound by these Terms and by our Privacy Policy. If you do not agree, do not use the Service.

1. Eligibility

You must be at least 13 years old to create an account. When you register, you must confirm that you meet this requirement; we record that confirmation and the date it was given.

Where the law that applies to you sets a higher minimum age for consenting to online services — for example 16 in parts of the European Economic Area — that higher age applies to you instead. If you are under the age of majority where you live, you may use the Service only with the involvement of a parent or legal guardian. In Québec, personal information about a person under 14 is collected only with the consent of a person having parental authority.

By using the Service you represent that you meet these requirements and that the information you provide is accurate. We may suspend or delete an account if we learn that the age confirmation was false.

2. Your account

You create an account with an email address, a username, and a password. You are responsible for safeguarding your credentials and for all activity under your account. Authentication and account credentials are handled by our identity provider (Supabase Auth); we never store your password in plain text. The age confirmation and the policy acceptance you gave at registration are recorded on your account. Notify us promptly of any unauthorized use.

3. The Service

Manamancer lets you build, organize, and analyze decks, track a card collection, and use AI-assisted deck review, deck generation, and strategy primers. AI features are available on every account, subject to a recurring usage allowance that differs by plan. Card data is sourced from Scryfall and is provided for reference only. The Service is provided on an "as is" and "as available" basis, and we may add, change, or remove features at any time.

4. AI features

AI features are available on every account. Each plan carries a recurring AI usage allowance, described in Section 8; when yours is exhausted the AI features stop working until it replenishes or you move to a plan with a larger allowance. The paid Pro and Max plans carry larger allowances than a free account, and Max carries the largest. Using an AI feature sends deck data to our AI provider on a free account exactly as it does on a paid one.

The Service's AI features review decklists, suggest cards or commanders, generate decklists, and write primers. To do this, deck contents, agent prompts and conversation history, generation preferences, and relevant card-search context are sent to our AI provider (OpenAI) for processing. Multi-round requests use stored OpenAI Responses API state retained for at least 30 days; single-shot requests ask OpenAI not to store response application state. Ordinary API abuse-monitoring logs may still be retained for up to 30 days, and OpenAI states that API data is not used to train its models unless the customer opts in. See our Privacy Policy for details. AI suggestions are generated automatically, may be incomplete or incorrect, and are not professional or guaranteed advice. You are solely responsible for any decisions you make based on them. Do not submit confidential or personal information through the agent.

5. Acceptable use

You agree not to:

  • break the law or infringe anyone's rights while using the Service;
  • misrepresent your age or another person's identity;
  • attempt to access accounts or data that are not yours, or probe, scan, or breach security or authentication measures;
  • scrape, overload, or disrupt the Service, or circumvent rate limits or the sign-up bot protection (Cloudflare Turnstile);
  • abuse, reverse-engineer, or resell the AI features or the card-search API; or
  • upload malware or content that is unlawful, abusive, or harmful.

We may suspend or terminate accounts that violate these Terms.

6. Your content

You retain ownership of the content you create — your decks, folders, collection, binders, agent conversations, feedback, and support-ticket messages and screenshots ("Your Content"). You grant us a limited, non-exclusive license to store, process, and display Your Content solely to operate and improve the Service for you (for example, syncing your decks across your devices and generating agent reviews). You are responsible for Your Content and represent that you have the rights to it.

7. Intellectual property

Magic: The Gathering, card names, card text, and card images are the property of Wizards of the Coast LLC. Manamancer is unofficial and is not produced, endorsed, supported, or affiliated with Wizards of the Coast. Card data and images are provided by Scryfall under their terms. All other Service software, design, and branding are owned by us or our licensors.

8. Subscriptions and billing

Plans. The Service is offered under a free plan and two paid plans, Pro and Max. Some features are offered only on the paid plans. Max includes every Pro feature and carries a larger monthly AI usage allowance than Pro. Each paid plan is available as a monthly or an annual subscription; within a plan, the monthly and annual subscriptions give the same features and the same monthly AI usage allowance. The current prices are shown in the app before you check out. Payments are processed by our payment provider, Stripe; we do not store full card numbers.

AI usage allowance. Every plan includes an AI usage allowance. The app shows the share of your allowance that remains as a percentage, together with the date it next replenishes. On a paid plan, the allowance replenishes every month on the monthly anniversary of your subscription — including on an annual subscription, which does not grant a full year of allowance upfront. On the free plan, the allowance resets every 30 days. Unused allowance does not roll over: each replenishment replaces what remained rather than adding to it. We do not sell additional AI usage credits. If your Pro allowance runs out, you can upgrade to Max as described below; if your Max allowance runs out, it replenishes on your next monthly anniversary.

Renewals and failed payments. Paid plans renew automatically at the then-current price of your plan until you cancel. If a renewal payment fails, your paid features continue while the payment is retried, but your AI usage allowance replenishes only once the payment goes through.

Upgrading from Pro to Max. A Pro subscriber can upgrade to Max at any time and keeps the same billing interval (monthly or annual). The amount charged for each of the two upgrade options is shown in the app before you pay:

  • Pay the difference. You pay the difference between the Pro and Max prices for your current billing interval. Your renewal date and allowance replenishment date stay the same, and your remaining allowance increases immediately. From your next renewal, the full Max price is charged.
  • Start a new Max term. You pay the full Max price, and a new Max term begins on the date of the upgrade. Your remaining allowance is replaced with a full Max allowance, and your monthly replenishment date and renewal date move to the upgrade date. Unused time on your current Pro term is not credited or refunded.

An upgrade takes effect only after your payment is confirmed, and it cancels any downgrade you had scheduled.

Downgrades and cancellation. You can schedule a downgrade from Max to Pro, or from Pro or Max to the free plan, in your account settings. A scheduled downgrade takes effect at the end of your current paid billing period: your next monthly renewal on a monthly subscription, or your next annual renewal on an annual subscription. Until then, you keep your current plan and its monthly AI usage allowance. You can cancel a scheduled downgrade at any time before it takes effect. When it takes effect, the features and allowance of your new plan apply, and unused allowance does not carry over. Canceling a paid subscription, including through the billing portal in your account settings, schedules a downgrade to the free plan in the same way.

Except where required by law, fees already paid are non-refundable. Prices and plan features may change; we will give notice of a price change before it applies to your renewal.

Nothing in this section limits any right you have under the Consumer Protection Act (Québec) or under other consumer-protection law that applies to you.

9. Third-party services

The Service relies on third parties — including Supabase (data storage and authentication), OpenAI (AI features), Stripe (payments), Cloudflare (bot protection), Resend (sign-up and support transactional email), Render (hosting), Scryfall (card data), and, when advertising is enabled, Google AdSense (advertising delivery and measurement). Advertising does not influence suggestions produced by the Service's AI features. Your use of the Service may be subject to those providers' terms, and we are not responsible for their acts or omissions.

10. Disclaimers

THE SERVICE IS PROVIDED "AS IS" AND "AS AVAILABLE" WITHOUT WARRANTIES OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT. We do not warrant that the Service will be uninterrupted, error-free, or that card data, prices, or AI suggestions will be accurate or current.

Some jurisdictions do not permit the exclusion of implied warranties. In Québec, the legal warranties provided by the Civil Code of Québec and the Consumer Protection Act apply and are not excluded by these Terms.

11. Limitation of liability

TO THE MAXIMUM EXTENT PERMITTED BY LAW, WE WILL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, OR FOR ANY LOSS OF DATA, PROFITS, OR GOODWILL, ARISING FROM YOUR USE OF THE SERVICE. OUR TOTAL LIABILITY FOR ANY CLAIM RELATING TO THE SERVICE WILL NOT EXCEED THE GREATER OF THE AMOUNT YOU PAID US IN THE 12 MONTHS BEFORE THE CLAIM OR USD $50.

Nothing in these Terms limits liability that cannot be limited under applicable law, including liability for bodily or moral injury and for intentional or gross fault.

12. Indemnification

You agree to indemnify and hold us harmless from any claims, damages, or expenses arising from your violation of these Terms or your misuse of the Service.

13. Termination

You may stop using the Service and delete your account at any time. We may suspend or terminate your access if you violate these Terms or if we discontinue the Service. On account deletion, Your Content is deleted in accordance with our Privacy Policy.

14. Changes to these Terms

We may update these Terms from time to time. When we make material changes, we will update the version and the "Last updated" date and, where appropriate, ask you to re-accept. Your continued use after changes take effect constitutes acceptance.

15. Governing law

These Terms are governed by the laws of the Province of Québec and the federal laws of Canada applicable therein, without regard to conflict-of-laws rules. The courts of the Province of Québec, judicial district of Montréal, have jurisdiction over any dispute arising from these Terms or the Service.

Where mandatory law gives a consumer the right to bring proceedings before the court of their own domicile — including article 3149 of the Civil Code of Québec and section 22.1 of the Consumer Protection Act — that right is preserved.

16. Contact

Questions about these Terms? Contact us at support@manamancer.com.

17. Language

The parties have requested that these Terms and all related documents be drawn up in English. Les parties ont demandé que ces conditions et tous les documents s'y rattachant soient rédigés en anglais. A French version is available on request from support@manamancer.com.