Wu Yi's gaze swept across every corner of the grotto.
Was the temperature stable because of the dense vines covering the walls and ceiling?
But...
Wu Yi looked up into the distance, at cart after cart being transported inward with raw Core Flame Vein ore, feeling almost frantic.
How had the vampires managed this?
So much Core Flame Ore—how had the vampires been able to continuously collect it on such a large scale?
She knew that collecting Core Flame Ore was extremely difficult. The mining environment was harsh, special tools were required, and those tools were highly prone to damage.
Even relying on the spawns' advanced technology could not achieve large-scale collection.
When the spawns had controlled this place before, the daily yield had always been limited. For thousands of years, mining efficiency had not improved.
Could the vampires have special mining techniques?
"How is it?"
