"Chaos Thunderfire?" The previously silent, hoarse voice was filled with surprise, with a rare trace of wariness in its tone, though it quickly recovered.
"So you mixed in a thread of chaos thunder power. Your Thunder Dao Seed is indeed remarkable, but there seems to be too little chaos thunder power within it. Otherwise, this grand formation truly would not be able to trap you."
"Is that so? Then let's see it." Yan Ji gave a cold snort.
Blazing thunder power erupted outward. For a time, lightning ran wild throughout the formation space, silver serpents dancing through the air.
The lightning carried an aura of chaos. Before vast numbers of Nether Copper Corpse Monsters could even touch it, their minds had already been affected by that terrifying thunder-art intent. Unable to mount any proper resistance, countless corpse monsters were reduced to ash.
With the thunder sphere at its center, swathes of empty space were cleared throughout the grand formation. The blood-black bone towers, too, were destroyed wave after wave.
Yet the formation's foundation was incomparably deep, and it immediately countered. Masses of blood-black light surged forth madly, devouring the thunder power. It could not completely suppress it for the moment, but it had already greatly weakened the thunder pearl's power. The surrounding Nether Copper corpse army recovered and reorganized its assault.
Yan Ji's expression shifted slightly. Amid the flashing arcs of lightning, large numbers of thunder-art spirit soldiers appeared one after another, clashing and slaughtering with the Nether Copper corpse army.
Yan Ji's face darkened slightly. The thunder power contained within the Chaos Thunder Pearl was indeed extraordinary, but competing with the enemy in attrition on their own turf was undoubtedly extremely disadvantageous.
If she could not break the formation before the thunder pearl was exhausted, she would have to