Just then, the second-tier, third-grade fire talisman finally exploded. In an instant, countless solid fire dragons surged across the sky, lunging straight at the Night Walker formation.
The flames of each fire dragon were no ordinary color, but a pale platinum. Wherever they passed, they left behind faint spatial collapses.
Faced with the fire dragons' world-destroying barrage, everyone in the Night Walker formation looked desperate.
Just as the fire dragons were about to crash into the formation, a streak of light suddenly shot over. In an instant, a portal of light appeared, blocking their way.
The portal was less than half a zhang wide and just over a zhang long, so naturally, it could not protect the entire formation.
In the blink of an eye, one fire dragon merely brushed the edge of the portal—and was immediately sucked inside.
As soon as that fire dragon was absorbed, all the others collapsed, turning into pure, surging fire energy that the portal swallowed in an instant.
Needless to say, the portal was none other than Xu Yi's Four-Colored Seal transformed.
Elder Xi had activated a second-tier, third-grade talisman. By all appearances, it was no different from unleashing an ultimate attack.
Xu Yi had no time to think of anything else. The only thing he could imagine might turn the situation around was the Four-Colored Seal.
By now, he had used the Four-Colored Seal so often that he more or less understood its properties.
Normally, after the Four-Colored Seal was activated once, it took at least three days before it could be activated again.
But if spiritual essence was used to replenish its spiritual power, there was no limit to how many times it could be activated.
Before midnight, Xu Yi had activated the Four-Colored Seal anew and immediately nurtured it with spiritual