"Kei, even if you successfully inscribe the seal array and achieve a union of minds with the Lingyu Blade, there is still one greatest hurdle." The Great Elder sighed.
"What?" Ueno Kei froze slightly. Had he overlooked something just now? He pondered for a moment, then his expression turned somewhat grim. Could it be...?
Ueno Kei looked at the Great Elder with an inquiring expression.
"That's right, Kei. Just as you thought, the hardest part is how to ensure that the blade can continuously absorb natural energy on its own!" the Great Elder declared forcefully.
"Throughout the Wind Wing Clan's long history, only two people have managed it. For everyone else, once the natural energy within the blade was depleted, they could only re-inscribe the seal array and absorb natural energy again. In that case, if you were drawn into a prolonged battle, Kei, this method could only serve as a final trump card and could not be used anytime, anywhere. After all, once your natural energy ran out, your enemy would never give you time to inscribe a seal array and absorb more natural energy." The Great Elder slowly explained the greatest difficulty. "And the Lingyu Blade's previous master—the old man's contractor—failed even to inscribe the seal array. He nearly destroyed the Lingyu Blade, and it was only later repaired with rare materials."
After hearing that, Ueno Kei fell completely silent.
Then Ueno Kei calmly asked, "Then, Great Elder, how can I make the Lingyu Blade automatically absorb natural energy?" He did not ask how to inscribe the seal array or how to achieve a union of minds, because he had sufficient confidence in that regard! As long as he kept exploring, he would definitely succeed!
But Ueno Kei was not content with merely that. He wanted to be