The reason lies in the fact that sound travels much faster and more efficiently through solids, especially metals, than it does through air, often ten or even twenty times faster. Therefore, the commands of the Crimson Iron Ant Queen were easily conveyed to every corner of the Crimson Iron Ant Nest.
But the Goblin Chief was different. With its apparently limited intelligence, it probably relied entirely on shouting to assemble its subordinates. It was possible that by the time Zhang Yanhang had finished clearing the surrounding areas, it still wouldn't have gathered many monsters.
So, hoping for the Goblin Chief was probably a lost cause. This time, Zhang Yanhang would definitely have to rely on his own efforts to clear the entire Goblin Plain. Though this method wasn't as quick as having a Lord Monster gather all the ordinary monsters together for a blast with a Thermo-baric Bomb, such opportunities were rare.
