If your display name or team name has been updated to something similar to "Player12345" or "Team12345", your previous name may have been against our Code of Conduct.
As this display name is pulled from your Wizards Account, it will be shared across Spellslingers, MTG Arena and the Companion App. Display Names against our code of conduct may have been reported across any of the platforms using this account.
Please Note: Your Wizards Acocunt, https://myaccounts.wizards.com/login, is separate from Magic Online or your Organized Play (DCI) account, https://accounts.wizards.com/
For more information about our account systems, please see this FAQ.