The seven stars represented the seven Void-Chosen.
One would obtain a star if they defeated another Void-Chosen. Once one of them gathered all seven stars, they would be crowned King.
The defeated would not lose their Void-Chosen status. They could challenge the others and win their stars back.
However, that was only limited to challenges between Void-Chosen. If a Void-Chosen was defeated by a Void-Chosen, they would be stripped of their Void-Chosen status and be demoted to Path-Chosen.
Of course, they could fight again and reinstate their status as Void-Chosen. However, it was very shameful to be demoted.
Those were the rules of the Coronation Battle.
Going by those rules, the Path-Chosen were nothing more than sparring partners, but they had the opportunity to turn the tables.
After going through Jiang Tiancheng's memories, Tang Hao had a bit of understanding of the other three eternal monsters of the First Continent.