(Dig a pit, shovel in some dirt, bury it, count one two three four five—see how good I am at digging pits! I held back for over a thousand chapters before bringing up this big soldier pit... Also, asking for monthly votes at the start of the month.)
The thing that had trapped the Vengeance Legion in another world—we did not know what it was exactly, whether it was a program or some supreme command—had acted like a barrier, protecting Sandora and her soldiers from the Old Empire's world-destroying disaster.
So in the end, we decided to call it the "Unknown Barrier Effect," or simply "the Barrier."
This Barrier looked like a cage, but its true function might have been more like the safety enclosure prepared for visitors at a wildlife park. You were locked inside, but it protected you from attacks by the beasts outside. The various restrictions it imposed on the Vengeance Legion now seemed so deliberate: prohibiting the activation of cross-world equipment, to prevent anyone from returning to the Abyss-contaminated zone; prohibiting communications beyond this universe, to prevent someone from accidentally reconnecting to the Old Empire Data Network; prohibiting the construction of all kinds of large-scale equipment, to prevent the Vengeance Legion from researching a way to break the Barrier. Sandora believed that if Bubble's functions had not been locked down back then, then with enough Mass-Produced Hosts, she would eventually have discovered the abnormalities within the soldiers through massive calculations and lifted the Barrier. Therefore, to eliminate that unstable factor, the "Barrier" had simply locked down all functions of the Shilin Mainframe.
As for why the Vengeance Legion had been unable to leave even a primitive planet back then, I thought it might have been because the Barrier's threshold had been set too high. To ensure