Privacy & your data

ARCANA at MTG Sandbox is an independently operated deckbuilding and collection workspace.

Your account

Auth0 handles sign-in, password recovery and email verification. ARCANA stores an identity reference so your decks, collection, preferences and saved research belong to your account. Your password is not stored in ARCANA.

Your workspace

Saved workspace data is stored on the operator’s server. It is private to your account. Authorized site administration, backups and operational logs support maintenance and recovery. Browser storage also keeps your workspace layout and recoverable drafts on your device.

Service providers

Cloudflare handles the public HTTPS connection and network protection. Auth0 processes account authentication. Card images may be retrieved from their recorded providers. Connecting ChatGPT is a separate authorization; creating an account does not connect it automatically.

Cookies and local storage

Essential session cookies keep you signed in. ARCANA uses browser storage for preferences and draft recovery. Do not use a shared browser profile for private drafts. No advertising trackers are installed by this application.

Export and account requests

You can export decks and collection data from the workspace. For account or data-removal requests, contact the site operator who provided your testing access. Account deletion is not yet self-service.

Last updated October 21, 2026.