"Attack!"
Outside Black Iron City, at Xing Hu's command, several thousand cultivators behind him rose straight into the air.
They did not rush to charge. Instead, several hundred cultivators flew slightly ahead, each bringing out sheets of talisman paper.
"Poof, poof, poof!"
The talisman paper activated, turning into fireballs, ice spikes, wind blades... a dense barrage howled toward Black Iron City.
When these attacks formed from talismans came within a hundred zhang of the city-
"Hum...!"
A gray-white light barrier abruptly appeared, enveloping all of Black Iron City.
"Whoosh...!"
As white light shone and dense formation patterns circulated, countless mysterious runes surged like a tide, releasing a powerful restrictive force.
The grand formation's light barrier swallowed some of the sky-filling attacks and reflected others, neutralizing them all in an instant.
Watching from the rear, Xing Hu and Bai Yinfang both looked unperturbed, as though they had expected this.
Bai Yinfang nodded. "It really is a top-tier level-four defensive grand formation. Even a Late-Stage Saint Warrior level Cultivator would find it extremely difficult to break through this Nine Palace Trapping and Killing Formation at a single point."
"No wonder this main city has held out in the Borderlands for so long."
Before they came, the leader of Blazing Cloud Stronghold had already described Black Iron City's defensive grand formation in particular detail.
"Hmph, they have a sturdy shield, but we have a sharp spear. A Top Level Four defensive grand formation is certainly extraordinary, but it still isn't enough against our Blood-Seeking Hall!"
Xing Hu sneered, took out a command flag, and raised his hand to wave it.
"Swish, swish, swish!"
At that moment, swathes of spirit light flashed within Blood-Seeking Hall's army formation in the air.
Several hundred bow-shaped "special magical implements" appeared in the center of the ranks.
Their