What's a golden core?

In the past few days, the northern sword immortal sect had been experiencing some incidents that were neither big nor small.

They didn't hold a celebration party because the sect leader had informed them that the great battle with the heavenly Devil Palace cultivators was about to begin.

In this battle, the foundational cultivators would not attack easily. The first to fight would be the disciples.

When the foundation establishment stage cultivators from the South Pill Palace and the East immortal sect returned to their sects, they would lose a great deal of face. Not only did they fail to obtain the position of the alliance leader, but even the core disciples of the sect abandoned the northern sword immortal sect, which was simply a joke to all the heroes in the world.