"Not bad, not bad, finally reaching city-level, next is the strength of the troops. It's a pity it's a bit too expensive. On the Human Faction's side, we still can't use all Gold-level troops."
Fang Jie's Undead System troops had gradually all turned into Gold-level.
It could be said that beneath the Gold level, only some special types would continue to be produced. For example, the silver-level Red-eyed Dragonfly, a major force in the air, had very strong combat power.
During the battle in the Foreign Realm, they weren't initially sent because the Space Channel was only so large and the cost-effectiveness was too low.
Later, as things developed, Fang Jie did produce quite a few, but because of the short time, they hadn't formed on a large scale. Also, since the focus was on the Gold-level troops, they didn't perform particularly well.
But that didn't mean they weren't strong enough; it was just that there were too few of them.