Only as now, when the goblins were extremely timid and their BOSS had fled and could no longer command them, was Zhou Tian able to capture the majority of the goblins alive when he invaded the Goblin Main City.
As a result, just as Zhou Tian planned initially, he easily captured a band of goblins when he successfully took over the Goblin Main City. Under Zhou Tian's threats, those goblins, who were quite spineless, all transformed into Beastmen. Just like that, Zhou Tian suddenly had tens of thousands more craftsmen skilled in Life Skills in his hands. It is believed that his weapon research and development capabilities would have instantly increased by several multiples with those craftsmen.
