Privacy Policy
Last updated: April 16, 2026
1. Introduction
Spellweave ("we," "our," or "us") is committed to protecting your privacy. This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our Magic: The Gathering deck building application and related services (collectively, the "Service").
By using Spellweave, you agree to the collection and use of information in accordance with this policy. If you do not agree with our policies and practices, please do not use our Service.
2. Information We Collect
2.1 Account Information
When you create an account, we collect:
- Email address
- Name (if provided through Google OAuth or account settings)
- Authentication credentials (securely managed by our authentication provider)
2.2 User-Generated Content
We store the content you create and upload, including:
- Card collections (imported or manually created)
- Decks and deck configurations
- Deck names and descriptions
- Import data from third-party collection managers
2.3 AI-Generated Content
When you use our AI features, we may store:
- AI-generated deck explanations and strategy text
- AI-generated strategy visualizations
- Prompts and parameters used to generate content
2.4 Usage Information
We automatically collect certain information when you use our Service:
- Log data (IP address, browser type, access times)
- Feature usage patterns
- Device information
2.5 Payment Information
If you subscribe to a paid plan or purchase mana, payment processing is handled by third-party payment processors. We do not store complete credit card numbers or banking details. We may store:
- Subscription plan type and status
- Mana balance for visualization generation
- Transaction history (dates and amounts)
3. How We Use Your Information
We use the information we collect to:
- Provide, maintain, and improve our Service
- Process your deck building requests and optimizations
- Generate AI-powered deck explanations and strategy visualizations
- Manage your account and subscription
- Communicate with you about updates, support, and promotions
- Analyze usage patterns to improve user experience
- Detect, prevent, and address technical issues or abuse
- Comply with legal obligations
4. Third-Party Services
We use third-party service providers to help operate our Service. These providers may process your data on our behalf under contractual obligations to protect your information:
- Cloud infrastructure and hosting providers: for storing your account data, collections, decks, and generated content
- Authentication services: for secure sign-in, including social login options like Google
- AI and machine learning services: for generating deck explanations and strategy visualizations
- Security and bot protection services: for protecting against automated abuse
- Card data providers: for Magic: The Gathering card information and images (no personal data is shared with these providers)
When you use social login (e.g., Google), we receive only basic profile information (name and email). We do not access your contacts, calendar, or other external account data.
5. AI Services and Automated Processing
We use third-party artificial intelligence services to generate analyses, recommendations, and media content based on your inputs. When you use AI-powered features:
- Data Processing: Your deck data, card selections, and related inputs may be temporarily processed by AI service providers to generate results. This processing is performed solely for the purpose of delivering the requested features.
- No Training on User Data: We do not use your personal data, decks, or collections to train AI models. AI services are used strictly for inference and content generation.
- AI-Generated Videos: Strategy visualization videos are generated using AI image and video generation services. These visualizations are fictional fantasy content inspired by gameplay strategy and do not depict any copyrighted characters or artwork from third parties.
- Prompt Data: Prompts used to generate AI content may be logged for quality assurance and debugging purposes. These logs do not contain personally identifiable information beyond what is necessary for service operation.
By using AI-powered features, you acknowledge that your inputs will be processed by these services as described above.
6. Data Sharing and Disclosure
We do not sell your personal information. We may share your information in the following circumstances:
- Service Providers: With third-party vendors who assist in operating our Service (as described in Section 4)
- Public Content: Deck videos shared via public links are accessible to anyone with the link
- Legal Requirements: When required by law, legal process, or to protect our rights and safety
- Business Transfers: In connection with a merger, acquisition, or sale of assets
- With Your Consent: When you explicitly authorize us to share your information
7. Data Retention
We retain your personal information for as long as your account is active or as needed to provide you services. Specifically:
- Account data: Retained until you delete your account
- Collections and decks: Retained until you delete them or your account
- Generated visualizations: Retained until you delete them or your account
- Usage logs: Retained for up to 90 days for operational purposes
After account deletion, we may retain certain information as required by law or for legitimate business purposes (e.g., fraud prevention).
8. Data Security
We implement appropriate technical and organizational measures to protect your personal information, including:
- Encryption of data in transit (TLS/SSL)
- Encryption of data at rest
- Secure authentication mechanisms
- Regular security assessments
- Access controls and authentication for internal systems
However, no method of transmission over the Internet or electronic storage is 100% secure. While we strive to protect your personal information, we cannot guarantee its absolute security.
9. Your Rights and Choices
Depending on your location, you may have the following rights:
- Access: Request a copy of your personal data
- Correction: Request correction of inaccurate data
- Deletion: Request deletion of your personal data
- Export: Export your collections and decks in standard formats
- Opt-out: Unsubscribe from marketing communications
To exercise these rights, please contact us at [email protected].
11. International Data Transfers
Your information may be transferred to and processed in countries other than your country of residence. These countries may have data protection laws that are different from the laws of your country. We ensure appropriate safeguards are in place to protect your information in accordance with this Privacy Policy.
12. Children's Privacy
Our Service is not directed to children under the age of 13 (or 16 in the European Economic Area). We do not knowingly collect personal information from children. If you are a parent or guardian and believe your child has provided us with personal information, please contact us so we can delete it.
13. Changes to This Privacy Policy
We may update this Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on this page and updating the "Last updated" date. For significant changes, we may also notify you via email.
Your continued use of the Service after any changes indicates your acceptance of the updated Privacy Policy.
14. Contact Us
If you have any questions about this Privacy Policy or our data practices, please contact us at:
Email: [email protected]
Magic: The Gathering Notice
Spellweave is unofficial Fan Content permitted under the Wizards of the Coast Fan Content Policy. Not approved/endorsed by Wizards. Portions of the materials used are property of Wizards of the Coast. © Wizards of the Coast LLC.