Magic Arena stumbled out the gate with the release of Zendikar Rising with black screen issues preventing players from accessing the game. Wizards of the Coast worked on the issues that persisted into the night on Sept. 17. Patch 1.12.00 is ushering in renewal season where sets are rotating out of standard when Zendikar Rising enters. Included in the patch is a new battle pass, emotes, and minor UI updates.
Here are the complete 1.12.00 Magic Arena patch notes.