Zhang Changqing stood alongside the other warriors of the Eight Thunder Law Orthodox Sects; this area was full of their people.
Zhu Yan demon crown prince gave them two choices: either break through the matrix or challenge the four demon princes. "If one won't work, we'll have to pick the other," someone whispered.
There were three Plane options of matrixes for them to choose from. If they failed, they would not be in real danger.
But if they chose to challenge those four demon beasts, their only Plane option was the True Self Saint Plane.
These four demons were on the same level; three of them were True Self Saint, and one of them the Doctrine Saint. Regardless of the Doctrine-Saint female monster of the Feather Men Clan, the three demon princes of the True Self Saint were their main opponents.
Since they had to conquer all of them to win, the challenge would've been too demanding.