The resources in the Demon Country were somewhat scarce compared to the Empire. During wartime, the issues of civilian livelihood were even more severe. However, an advantage still existed, which was their outstanding combat capability.
As soon as the demons were born, they had combat power. Many demons did not need to "grow up" or "train"; as long as they emerged from the Demon Pool or transformed into demons at the cost of flesh and blood, they could be put directly to use.
Therefore, some things could be safely taught to the demons.
...
Satan Ye recalled Yila's demonstration from the morning, vaguely remembering... The pitch-black Mana condensed on Yila's pitch-black spear, causing a massive wind pressure. The black wind turned into a spiral shape, constantly rotating on the spear, tearing the surrounding air apart.
