After night fell, high above Nest City.
Patrolling Blood Raven Guards circled through the air, looking down over the entire Nest City. Countless sharp eyes watched every suspicious moving thing.
To Nest City, everything on the ground was secondary.
What mattered was atop the giant trees. There lay the essence of the Blood Raven Clan—either nest-refining sites or places of vital importance.
Flight was forbidden in Nest City. Those who flew without status or identity would, at best, have all their cultivation crippled; at worst, be executed on the spot.
Somewhere on the western side of Nest City stood a giant tree noticeably thicker than those around it. Four Blood Raven Guards stood watch around the tree, alert to every movement in the surroundings.
Clearly, this was a vital place among vital places.
Looking upward, atop the giant tree and amid the clouds, a massive nest-like structure loomed vaguely through the mist, giving off wisps of fragrance. Even near the ground beneath the tree, the scent could be clearly smelled.
Just then, one of the guarding Blood Raven Guards suddenly felt the darkness around him seem to thicken all at once, causing the torch used for night patrol to dim slightly.
The Blood Raven Guard instinctively blinked, then rubbed his eyes.
Yet when he opened them again, that sudden sense of thickness had vanished.
"What's wrong?" The Blood Raven Guard beside him noticed his strange behavior and asked alertly.
"Nothing... I've been looking too long. My eyes feel a little uncomfortable." The Blood Raven hesitated for a moment, then shook his head.
At the same time, atop the giant tree.
This was a vast valley among hills, hidden in the clouds. At times it was shrouded in mist, and at others it emerged from it, like an immortal realm. At