The cultivators within the grand formation could feel the formation nodes beneath their feet trembling slightly under wave after wave of luminous impacts. They were all greatly startled.
When this grand formation had been laid out, its sturdiness had been tested. Back then, it had withstood the head-on impact of an extraterrestrial meteor, and the formation walls had not trembled in the slightest.
This showed just how mighty those beams of light were.
Yet the cultivators within the formation remained calm. Though their expressions were grave, no one showed any sign of nervousness. For tens of thousands of years, the people of this world had fought against enemies from beyond the heavens and had almost constantly been embroiled in battle. Although they had never experienced combat at the Upper Layer, they adapted to it with remarkable speed.
The Primordial Spirits of those foreign cultivators had now appeared before the grand formations in every region. Their earlier assault had been intended, first, to shield their own advance, and second, to probe the enemy's defenses.
Yet they had received no interference throughout, and had been allowed to rush right up to the formations. This meant the enemy likely lacked the ability to interfere, which also matched the circumstances of this world.
Above them hung a crystal sphere that monitored the entire region. Through communication between their true selves, they could advance and retreat together.
Now that they saw the defenses were solid, nearly all the Primordial Spirits simultaneously sacrificed a talisman. The talismans drifted in midair for a moment before flashing with light and crashing into the formation walls ahead, shaking the grand formations again and again. Yet the formations were not breached, so they brought forth magical artifacts to bombard them instead.
Standing within one of the grand formations, Zhang Yu