The Beidou Array was activated by Great Cultivator Yu Chao using the Beidou Sect's treasured "Beidou Formation Map"; the "Beidou Formation Map" is a special kind of Array Plate.
Or perhaps one should say the Array Plate is a simplified version of the Formation Map, with the Formation Map being the means to instantly activate formations and maintain their maximum functionality.
Within the "Beidou Formation Map" is the understanding of formations by a great being, as well as their insight into the rules, giving the "Beidou Formation Map" the power to trap and kill Great Cultivators.
Once the "Beidou Formation Map" was activated, Li Yuanba was trapped within the formation, losing the "Divine Foot Skill" space movement divine skill. Under the control of Great Cultivator Yu Chao, all the Great Cultivators participating in the encirclement of Li Yuanba could hide within the "Beidou Formation Map".
