Lu Yang first laid out a Listen to Wind Seal stretching three thousand miles along the vertical face of the canyon, starting from the southeastern corner he was guarding.
After that, he circled the entire Dragon Sleep Valley with a ring of Listen to Wind Seals, extending eight hundred miles vertically.
That way, he would sense anyone approaching Dragon Sleep Valley at once.
If anyone came toward the direction he was guarding, Lu Yang would detect them from three thousand miles away.
And if someone attacked from another direction, he would still sense them from eight hundred miles away.
That way, should anything unexpected happen, Lu Yang's team would have ample time to prepare.
Even if a king came bearing down on them, they couldn't travel three thousand miles in a single second. As long as they came from his direction, Lu Yang was absolutely certain he would detect them.
There was just one drawback.
Creating these Listen to Wind Seals consumed a martial artist's own will.
Although each seal used up very little will, Lu Yang had released hundreds of thousands along the way. Even so, it had placed an enormous strain on his soul.
Three days later, Lu Yang returned to the Shanhe Platform he was guarding, utterly exhausted.
His body's fatigue was secondary.
He had simply expended too much of his will, putting pressure on the source of his soul and leaving him so tired he could barely keep his eyes open.
Of course, it wasn't really a serious problem. Will wasn't Spiritual Sense; it was merely a comparatively feeble thought. All he needed was to lie down and sleep soundly, and he would recover tremendously.
But Lu Yang didn't want to sleep just then.
If he fell asleep while carrying out his mission, he could easily