Avernus.
Before the hastily constructed fortresses, demons had already begun cautiously moving back in.
Among these demons were survivors from the previous wave, as well as demons that had just crawled out of the pits of the Plain of Infinite Portals from newly arrived Abyssal Worlds.
Facing the devils' defenses, the demons launched their attack directly.
The fires of war blazed across this land once more. Naturally, these crudely built fortresses could not compare to the Bronze Citadel or other devilish main cities in terms of defenses.
Yet even an ordinary wall offered greater defensive advantage than devils forming ranks in the open.
The demons would have to pay a tremendous price in casualties to assault these fortresses.
High in the sky, Huo Ling had already cast Undead Cataclysm.
Ash-gray clouds churned overhead. This spell had been accumulating power for more than half a month, and everything nearby seemed shrouded in dense gray-white fog.
The devils had long grown accustomed to fighting in such an environment. As for the undead, they were even more like fish in water here.
Both demons and devils possessed darkvision. Though the fog of death mana hindered their sight, they could still see their enemies clearly.
But as the battle continued, Undead Cataclysm's effects became increasingly pronounced. Bolts of deathly shadow lightning struck down from the sky.
Every strike killed more than a dozen demons, sometimes even more.
Besides the demons slain atop the fortress walls, there were also those killed beneath and beyond the walls by defensive equipment and all manner of long-range attacks.
Even the demons who died in the melee among their own kind revived under the influence of Undead Cataclysm, indiscriminately attacking other demons.
These freshly risen demon zombies charged fearlessly into battle.
They threw the entire battlefield into even greater