Does Ember Monk's ability "When you play a card from hidden" trigger when the card is played from hidden on a different battlefield than where the Monk is located?

Ruling: Yes, Ember Monk's ability triggers when you play a card from hidden on any battlefield, not just the battlefield where the Monk is located.

Nuances:

• The ability does not specify "here" (meaning the same battlefield), so it applies globally across all battlefields.