The Heaven-Eye Formation was not some profoundly sophisticated array; its efficacy relied primarily on the materials used for its eye.
In past editions of the Xuantian Grand Tournament, without any Heaven-Eye Formation deployed, the Xuantian Sacred Land simply used their Saint Artifact, the Zhaotian Mirror, to monitor the grotto-heaven directly—far more effective than any formation.
The Dacang Emperor’s Dynasty lacked a mirror of Saint Artifact grade, and even if they had one, there was no need to bring it out. After all, the Outer Realm Starry Ancient Battlefield was not owned by any single faction, and since a Heaven-Eye Formation was already naturally embedded there, they only needed to set up an observation node.
Chapter 279