```
But when Shu Guan reached for his quiver again, he grasped at empty air.
All twenty iron arrows had been shot.
And to retrieve the iron arrows would take a mere few dozen breaths of time.
Without giving it another thought, Shu Guan flicked his wrist, and the ox-ear sharp knife appeared in his palm, then he sprang from within the window, pouncing towards the skeletal Bone Mountain in the sky.
The cultivation level of that mysterious person impersonating "Swallow" had been ascertained through the twenty arrows he had just fired.
Fortunately, it wasn't an Earthly Immortal but merely an expert of Nascent Soul.
However, it was also the strongest Expert of Nascent Soul he had ever encountered.
Twenty iron arrows, especially after his own strength had greatly increased, had still failed to kill the adversary.
It was likely that the person's strength was infinitely close to that of an Earthly Immortal.
