When Zhonya's Hourglass is played from hidden at a battlefield, when does it return to base, and does its trigger apply to units dying at any battlefield or only the battlefield where it was played?

Ruling: When Zhonya's Hourglass is played from hidden at a battlefield, it is recalled to its controller's base during the next Cleanup. As written in the current rules, its trigger applies when any of your units dies at any battlefield, but the developers apparently intend for it to only trigger when units die at the battlefield where it was played.

Sequence:

• Zhonya's Hourglass is played from hidden at a battlefield
• During the next Cleanup, it is recalled to the controller's base
• If the trigger doesn't complete at the battlefield, Zhonya's triggers from base when any unit dies

Nuances:

• Rules As Written (RAW): The trigger works when any of your units dies at any battlefield
• Rules As Intended (RAI): The trigger should only work when units die at the battlefield where Zhonya's was played
• Developers are reportedly working on an errata or rule change to address this discrepancy