We will be performing scheduled maintenance on May 23rd, 2019 at 8AM PT (15:00 UTC) to deploy the 0.15.00.00 game update. Maintenance is expected to last approximately 90 minutes.
While no downtime is expected, this is a required update. Players who are logged in prior to the start of maintenance will be required to restart their client to download the patch.
Patch notes will be available once maintenance is complete. To learn more about this update, please refer to the May State of the Beta: https://magic.wizards.com/en/articles/archive/magic-digital/mtg-arena-state-beta-may-16-2019