Legend has it that in ancient times, humans were incredibly powerful. Human champions could tear through the barriers between planes at will, travel to Dragon Island to capture dragons as mounts, go to the Elven Kingdom to catch elves as pets, venture into the Demon Realm to capture demons for crafting magical treasures and pills, and raid the sea folk to take merfolk as laborers, among other things.
At last, the champions of the six great races could no longer endure humanity's cruelty. The God Emperor, the Dragon Clan Patriarch, the Demon King, and the Elven Queen joined forces with the other great races to declare war on humanity's champions.
After forty-nine days of fierce battles in the chaotic void, legend has it that the five human emperors were killed and the three ancient quasi-Martial Gods vanished without a trace. But the other six great races had also suffered devastating losses and lacked the strength to exterminate humanity. This battle later came to be known as the War of All Heavens.
The champions of humanity and the other races fought to the death in the chaotic void. The masters and champions of every race suffered catastrophic losses, and all returned to their homelands to recuperate.
This story follows a reborn human who leads humanity to the pinnacle of the world and brings the various races together to live in peace.
