It depends on what was powering up the Arbiter. And… we don’t know.
At some point I saw a mention that Malygos used surge needles to redirect Azeroth’s ley lines into the Nexus and to the Twisting Nether during the Nexus war. Which made me think… if ley lines of Azeroth could be used outside of Azeroth, could it be the thing that kept Arbiter working? (if the Arbiter is a machine or a construct).
In the Return to Karazhan patch, there was a peculiar event. There were such lines:
Anduin Lothar:
It couldn’t have been helped, you know. We tried to alter it, but it was all part of a larger scheme.Archmage Khadgar:
I know. All part of a greater cycle. A cycle that now at last may be broken.
What is Karazhan? Other than the place where all the ley lines used to go,
Viz’aduum the Watcher:
Karazhan’s presence radiates through the Nether… a beacon drawing in the Legion’s might. Our Burning Crusade has consumed countless worlds. This tower will serve as a conduit to each of them.
And Medivh himself states:
Medivh:
I will open the way. While you battle that fiend. I will sever the tower’s connection to Legion worlds. I suggest we be quick about it!
So, it already was connected to countless worlds when we got to the place.
If we assume that ley lines somehow could be used for something of that kind, then severing all the connections from Azeroth, or just messing up with ley lines could also cause such side effect. Besides, apparently Medivh would not mind to “shatter the cycle” anyway.
In the end he says
Medivh:
It may be simpler to shut a door than to pass through it. But sometimes a step into the unknown is required to break the bonds of fate.
But all of it is a baseless speculation and going to stay like that until we learn what powered up the Arbiter.
And by the way, the only place which has a location that is known relative to Azeroth, it Torghast tower, which seems to be “up side down” right above the icecrown.
Just like time is a problematic question in Shadowlands, so could be the space. But in general, depending on which side from the Torghast tower Oribos tower would be, the direction to the second one would be either across the Vault of Archavon, somewhere towards the Berean tundra, or in the opposite direction.
What does it all mean?
Edit: in the video form
Anduin Lothar part - 27:27
Medivh appears - 28:53
Viz’adoom right after.
gl hf