Things weren't looking good as more than ten inheritors rushed to the Sixth Hidden Pagoda, bringing carnage underground. Some were forced to use Escape Talismans, and some were actually killed in battle.
However, they eventually managed to shorten it to eight people and enter the Sixth Hidden Pagoda, starting the trial.
If they completed the Sixth Hidden Pagoda's trial, then everyone would be teleported out, and the Mystical Herb Mansion would be burned to the ground, including all the treasures. The fact that this island was far away from the mainland finally made sense, as destroying all those treasures was going to cause devastating waves of energy to erupt and destroy the surroundings.