The Trial Grounds, also known as the Burial Grounds of Gods, numbered several hundred across the Otherworld. They could be found in the outer regions of the domains controlled by the Nine Elemental Gods, the twenty-six Dragon Emperors, and the Hundred Forbidden Zones.
Every ten years, the Trial Grounds produced a special substance capable of advancing someone to demigod status. After drinking it, one could rapidly condense a divine soul and meet the requirements for advancing to demigod. Yet this substance was strictly controlled in the territories of the Nine Elemental Gods and the twenty-six Dragon Emperors. Even the God-Affiliated Races under the new gods and Dragon Emperors could not provide enough advancement treasures for every member about to become a demigod, let alone powerful members of races not affiliated with gods. Thus, the Hundred Forbidden Zones became the common choice of all powerful beings.
Every forbidden zone in the Otherworld was a place where the world's origin overflowed. Countless Sons of the Ancient God, ferocious beasts, and vicious insects lurked within. Even a God King could not emerge alive after entering. However, the outer regions of these forbidden zones—the places where treasures for advancing to demigod were produced—contained few magical beasts or vicious insects, and not a single Son of the Ancient God.
Whenever that day arrived, the God Kings and Dragon Emperors of the Otherworld would send their mid-level gods and lower gods to work together around the outskirts of the major forbidden zones. If a lone ferocious beast or vicious insect appeared, they would be responsible for killing it. If a Son of the Ancient God appeared, then the demigods preparing to advance would simply be unlucky. The mid-level gods and lower gods would immediately flee with their own clansmen, while everyone left behind would be doomed.