A few minutes later.
All the Skeleton Sentinels were slain by the goblins in the depths of the cave, but Lu Yuan had already obtained the information he wanted.
This cave was complex and easy to defend but hard to attack, resembling an underground labyrinth.
An ordinary person would easily get lost if they rashly ventured inside.
Moreover, at least hundreds of thousands of goblins lived inside, akin to a small Goblin Kingdom.
A direct assault would surely result in heavy losses.
But this was not a problem for Lu Yuan.
Holding the Skull Staff, he quietly chanted a spell.
[Tier Six Dark Magic: Plague Poisonous Fog!]
The elements within a ten-mile radius seemed summoned, converging toward him frantically.
The elements gathered and formed a gigantic Hexagram Magic Array in the sky.
Waves of highly poisonous green mist emerged from the array, spreading through the ventilation shafts to the entire cave depths.
