As Xal'atath and Ulthalesh fought their way into the World-Soul, completely shattering the orderly state of affairs there.
The Arcane Drones could finally explore at their leisure.
The space inside the World-Soul was vast, and the height of its sky was even more astonishing!
On the surface, the thickness of the atmosphere limited the sky's height to just over a hundred thousand meters.
Argus the Unmaker's head had already poked out of the atmosphere!
For flesh-and-blood creatures, the sky only reached ten thousand meters high.
Even the world's highest-flying birds could only reach an altitude of ten thousand meters and could go no higher.
The higher they flew, the more severe the oxygen shortage became, making normal flight difficult to maintain.
Inside the World-Soul at the planet's center, however, there was no such restriction.
Its sky was millions of meters high.
Of course, there was certainly no blue sky or white clouds here!
In this dim underground world, anyone looking up at the sky could see only endless darkness.
It was just like a night sky without stars or a moon!
After tens of thousands of years of development by the Burning Legion, the underground world had become an enormous industrial world.
This was the Burning Legion's safest and most important core.
But the Burning Legion was still far too arrogant!
Its supposed safety applied to dealing with ordinary interstellar races in the universe.
If it encountered the Naaru Burning Legion, thoroughly prepared in advance and intent on fighting a major battle against the Burning Legion.
Fighting their way here would be no difficult task.
It was just that the Naaru liked to punish evil and promote good throughout the universe in small teams.
If Sargeras encountered the Naaru Burning Legion with more than ten teams assembled, even he would