Heaven-Piercing Cavern was not a cave, but an unbroken expanse of towering mountains. It was also the frontline battlefield where the borders of the Star Luo Empire and the Spirit Hall Empire met.
Forests covered eighty percent of Heaven-Piercing Cavern, and its average annual temperature was fifteen degrees Celsius. Vast stretches of pristine forest, rarely touched by human footsteps, still remained there. It was the most representative mountainous subtropical evergreen broadleaf forest region on the Douluo Continent, home to over a thousand plant species, including Chinese yew, ginkgo, Chinese sweet gum, and white-berry yew.
These endless, towering mountains connected to Life's Edge and Hundred Flowers Valley in the east. To the north, crossing the Hengduan Mountains brought one into the Douluo Empire, less than two hundred kilometers from Suotuo City. To the west lay the Tas Grassland and Infinite Grassland, an immense stretch of plains spanning thousands of kilometers. If the frontline at Heaven-Piercing Cavern fell, the Spirit Hall Empire's army could drive straight in, its spearhead aimed directly at the Star Luo Empire's capital.
At present, Heaven-Piercing Cavern was no less important than any city in the Star Luo Empire.
Thus, the Star Luo Empire had dispatched every army and powerful Spirit Master it could muster to this vast expanse of mountainous forest. Their encampments stretched for over a hundred li, farther than the eye could see.
Every day, across this vast landscape, the Spirit Hall Empire and the Star Luo Empire fought to the death over a hilltop or a river, neither side willing to yield.
For the people of the Star Luo Empire, there was nowhere left to retreat. They could never allow Heaven-Piercing Cavern to fall. If it did, their loved ones far behind the lines would face the Spirit Hall Empire's merciless slaughter.
As for