"Rumble!"
Their deliberations had actually taken only a few breaths.
With the third-tier demon cultivators joining the battle, the Bright Moon Demon-Sweeping Formation's offensive faltered. Countless demon beasts continued closing in on the Immortal City from every direction, their advance seemingly unstoppable.
Under the demon cultivators' control, the beast tide could more or less obey orders, halting once it entered a certain range.
"Whoosh, whoosh!"
In an instant, countless sounds of rushing air rang out.
Countless demon beasts unleashed their innate spells and divine abilities. Multicolored spiritual light immediately blazed across the vast sky, as though a magnificent, beautiful meteor shower had appeared.
Spells and divine abilities of every kind streaked across the sky, raining down at tremendous speed upon the Silver Light Curtain generated by the Bright Moon Demon-Sweeping Formation.
"Bang, bang, bang!"
The next moment, a dense barrage of explosions erupted throughout the Immortal City.
A single low-tier spell could not shake the Silver Light Curtain at all, much less stir even the slightest ripple.
But when their numbers reached tens of thousands, even fourth-tier beings could not ignore them, and even a fourth-tier middle-grade formation would be shaken.
Under the bright daylight, the Silver Light Curtain visibly trembled, making many cultivators' hearts tighten.
Fortunately, beneath everyone's watchful eyes, the Silver Light Curtain merely trembled slightly and showed no sign of breaking.
It was, after all, a fourth-tier middle-grade formation, with sufficiently sturdy defenses.
Unless something unexpected happened, it could hold out for a while even under a furious bombardment from several Fourth-Tier Demon Kings.
"Fight back!"
Amid the thunder of spells, a cultivator roared.
In an instant, brilliant spiritual light erupted along stretches of the city wall. Low-tier spells rose into the air before falling toward the countless demon beasts below.
Many specialized magical artifacts designed to