Compared with the pursuing force on this side,
the mechanized forces that entered through the other metal passages encountered no further obstacles.
After nearly twenty thousand years, fewer than a hundred machines in the mechanical garrison stationed here could still move, and the presence of the Chaos forces had caused them to concentrate in one location.
The other mechanized forces soon advanced faster than the Chaos army, which remained busy fending off attacks from the mechanical guards.
Nearly two thousand kilometers beneath the planet's surface, an enormous cavernous structure came into Iax's view.
A coordinated sweep of scanning devices fully revealed the planet's underground structure.
Six immense metal shafts had been bored two thousand kilometers deep into this planet, which measured twelve thousand kilometers in diameter. At that depth, the shafts opened into a gigantic cavity encircling the entire planet.
The entire subterranean layer had been hollowed out. Countless enormous tanks and massive alloy structures filled this immense space, a hundred kilometers high, in a precise arrangement.
Deeper still lay the planet's churning, intensely hot core.
Clearly, the entire planet had undergone extensive modification and had been almost completely hollowed out.
The gravitational environment here lay at the balance point between the planet's solid outer shell and its core, making it much like being in space.
The green, high-energy vapor came from leaking tanks in an interconnected storage area somewhere underground.
Although the powerful gas circulation system was still operating, its control system had clearly malfunctioned. The vapor was constantly filtered and collected, compressed, liquefied, then leaked all over again.
On these tanks, Iax found a highly distinctive symbol and a string of text.
Ultra-high-pressure liquid Yttrium Gas mineral storage tank.
Iax's database contained no detailed information on this energy mineral, merely a note identifying it as an extremely important