Chapter 139: Bull Ear Dagger

The tip of the knife trembled rapidly and faintly.

Shu Guan maintained the infusion of spiritual power into the ox-ear tip knife while gazing intently at the rapidly vibrating tip.

It was a high-speed vibration that was difficult for the naked eye to discern, and Shu Guan's eyes were no exception.

Although it was difficult to see with the naked eye, one could feel the terrifying power contained within the rapidly vibrating tip.

Shu Guan had not yet figured out the limit of this force, but he had made numerous attempts.

For example, thrusting the spirit-infused ox-ear tip knife towards a cliff, the hard rock instantly turned into the finest powder under the rapidly vibrating tip, and the ox-ear tip knife plunged into the cliff like a piece of tofu.

The ox-ear tip knife was very sharp before, capable of easily cutting through tough boar skin, but it could never pierce rock.

It was only after Shu Guan infused spiritual power that the ox-ear tip knife became even sharper.