After True Lord Seven Kills made his announcement, all the warriors present were itching for action. They were also wary of Yi Yun, knowing he was not someone easily dealt with, but there were a lot of them and only one of him. With the Celestial Vanguard's cooperation, Yi Yun was definitely at the end of his rope.
They were further enticed when they saw True Lord Seven Kills produce a red jade box. According to way the Pillheart Sect usually sold its pills, the red jade box likely contained Spirit Illumination Pills that could even allow Supremacies to make a subrealm breakthrough.
