Inside the Cultivation Cave Mansion, the dazzling saber light illuminated every detail of the stone cavern.
The seventy-two cave mansions of the Upper Scenic Celestial were carved into different mountain peaks. Although the one Zhang Yuan rented was of the lowest grade, it had all the necessary facilities.
Zhang Yuan had been channeling the divine saber light to wear down the Celestial Divine Iron for three days and nights, and he was still full of energy, without the slightest fatigue or weariness.
Perhaps this cave mansion could indeed gather spiritual qi, greatly benefiting the cultivator within.
However, this wasn't Zhang Yuan's focus; his attention was wholly concentrated on the Celestial Divine Iron in front of him.
After thirty-six consecutive hours of cutting and grinding, half an inch of the surface of the Celestial Divine Iron had been removed, fully exposing its dark golden core.
In fact, initially, the Red Blood Saber's divine light quickly dissolved the iron.
