The steel passageway was dim and fathomless.
Rivets from who knew how many years ago lay neatly arranged before him, whistling past his ears as he sped forward.
When Lucius first set foot here, they were the only things he could see.
Perhaps the vast steel facilities beneath the Ural Mountains had left Kasgar and the others with little room for drills.
But in the underground world of this hidden towering foundry, there was nearly limitless space for everyone to test their skills.
Given the close ties between the Third Legion, the Iron Hands, and the Adeptus Mechanicus, as well as the fact that Kasgar's machines had proven themselves in real combat,
when Kasgar proposed borrowing the underground testing grounds, the Adeptus Mechanicus practically handed the place over to the Sons of the Emperor in flattering formal language.
It was hard to imagine just how far humanity of the Old Night era had advanced its technology.
The pitch-black passageway finally came to an end.
Following the scattered points of light outside, Lucius found that aside from the silver-white steel dome overhead, laid out and piled in such abundance that it seemed almost free, this place looked no different from the surface.
Only the charred impact marks on the hundred-meter-high dome quietly hinted at the foes they had once faced.
It was difficult to imagine what kind of terrifying mechanical behemoths had once been tested here.
Lucius crouched down and touched the waist-high vegetation on the ground, signaling the five Chemos-born recruits behind him to complete their tactical deployment.
One of the squad members nodded, gently pressing the pale-purple mechanical backpack on his back. He took out more than a dozen folded black machines and unfolded every one of them.
Their long mechanical limbs spread out like those of spiders, and