The border between the Other Domain and the Nine Heavens and Ten Lands was vast beyond measure, stretching across hundreds of millions of li.
The mysterious Heavenly Abyss contained power of supreme might. Many Immortal Kings of the Immortal Domain had refined it from an incomplete Great World and set it over the junction of the Two Worlds, preventing experts of Immortal rank and above from crossing over from the Other Domain.
The Imperial City, built from the remnant cores of countless stars, blocked the Other Domain's armies below Immortal rank.
Although these two heavenly barriers held back the enemy, the Nine Heavens and Ten Lands still sent out wave after wave of experts to fight the Other Domain's armies beyond the pass.
Lu Chen stood deep in the heavens, at the edge of the Heavenly Abyss. Watching the Imperial Pass repeatedly send geniuses of the various races into battle, he knew the leaders of the Nine Heavens were training their troops.
They wanted to temper those geniuses in blood and fire, allowing them to grow as quickly as possible.
Before long, Lu Chen saw Shi Hao arrive at the Border Wasteland Imperial City and join the battles against the Other Domain's experts.
But Shi Hao was never one to stay put. After one battle against the enemy army, he actually failed to return to the Imperial City with the main force.
Instead, he secretly moved sideways into a mysterious region of the Border Wasteland known as the Divine Medicine Mountain Range. Deeper within lay the Heavenly Beast Forest, the Burial Region, and other places.
Those regions were full of unknowns and countless dangers. Even Supreme experts faced a great chance of perishing if they entered these lands left behind from the Immortal Ancient Era.
The most mysterious of all