"What's going on? A formation?" Hu Bugui also flew into the air, standing beside Shen Luo as he asked in surprise.
At that moment, countless runes emerged from the yellow light on the ground and streamed toward buildings of all sizes throughout the city, merging into them.
The yellow light, as though drawn by something, adhered to the buildings permeated by the runes. In the blink of an eye, it formed a layer of ice-crystal-like yellow shielding around them.
In an instant, the surfaces of every building in Chang'an City were covered by a yellow barrier.
Shen Luo raised his brows at the sight.
"This is one variation of Chang'an City's protective grand formation. It applies Wu Earth Spirit Light to the buildings in the city, protecting the safety of the people inside," said the Great Tang Government Office disciples as they flew over.
Shen Luo had already guessed as much, and he nodded slightly at their words.
With the city's buildings protected by yellow barriers, all attacks launched by the fiends within the city were repelled upon striking them, unable to harm the people inside in the slightest.
Though those yellow barriers appeared ordinary, they were in fact utterly indestructible.
The retainers and Great Tang Government Office disciples protecting the people throughout Chang'an City breathed sighs of relief. At last free to act, they unleashed all manner of Magic Treasures and secret arts at the fiends.
The fiends were fierce and unruly. Seeing that they could not kill the civilians, they immediately struck back.
No longer needing to worry about the civilians, the court retainers and Great Tang Government Office disciples also fought the fiends without restraint.
For a time, lights of every color crashed together fiercely, and thunderous booms shook the land for hundreds of miles.
Just then,