Little to nothing is known about the Ethereal Divide, and it is unknown if it ever had a beginning, or will have an end.
As the ninja were trying to escape the Temple of Airjitzu, they opened a door and almost fell into the Ethereal Divide. Fearing what might lurk in its depths, they quickly pulled themselves up back into the Temple.
- The Preeminent
- 93. "Lessons for a Master"
- 113. "A Cold Goodbye"
- Apparently, the color of the Ethereal Divide depends on which realm a person travels to, because when the ninja traveled to Ninjago, it is a brown and green color and when the ninja traveled to the Never-Realm, it is white.
- The Ethereal Divide is a direct reference to the Dungeons & Dragons location known as the Ethereal Plane, which connects all the planes of existence, which are similar to Ninjago's realms. It is described as being a land of fog, which seems similar to the little we see of the Ethereal Divide.
- It is possible that the Ethereal Divide stretches on for eternity since it has no shape or form.