Cultivation is just so scientific!

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Compared to the phantom shadows within the "Five Ghosts Soul Refining Banner," the copper corpse more closely resembled an perpetual motion machine, its strength being greater and its movements swifter.

The shortcomings of the copper corpse were also obvious; it lacked the ability to cast spells and engage in long-range attacks such as flying swords, making it a typical melee combatant.

Li Shiming took a giant axe out of his storage bag and handed it to the copper corpse.

The copper corpse, obedient under normal circumstances, took the axe.

Li Shiming, accompanied by the copper corpse, headed to a corner of the Cultivation Room where he first took out the Fiery Flame Sword and began cutting the wall with his channeled Spiritual Energy.

He dug very carefully, and soon chiseled out a one-cubic-meter-sized rock from the wall, which he perfectly stored in his storage bag.

He called for the copper corpse to dig downwards.

Using the copper corpse to create underground space not only lightened his own burdens but also served to train his control over the creature.

There were two ways to control the copper corpse: first, Li Shiming could issue a clear command to the copper corpse through the Blood Covenant, and the copper corpse would follow this command obediently.

For instance, if Li Shiming commanded the copper corpse to attack a particular target, then the copper corpse would rely on its own combat instincts to relentlessly attack that target until death.

Second, Li Shiming could control the copper corpse directly through the Blood Covenant, making it completely obedient like a puppet under his manipulation.

Of course, he couldn't make the copper corpse perform tasks beyond its capabilities, such as if he wanted it to channel Spiritual Energy and release a "Spring Breeze and Rain Skill," the current copper corpse was incapable of doing so.

A descending passage within the small mountain was rapidly being excavated, with Li Shiming collecting all the rocks and earth into his storage bag.

His excavation wasn't haphazard; after careful observation, he created a topographical map of Eagle Beak Island on the IBMz15 and devised an excavation plan after analyzing the conditions of the walls inside the lair.

With the copper corpse's efforts, the work of excavation became incredibly simple.

With immense strength coupled with the Low Grade Giant Axe Magical Artifact, it plowed through rocks and earth, clearing large areas with each strike.

Only after digging down ten meters did Li Shiming instruct the copper corpse to carve out the underground space.

At a height of ten meters, with his physique, he didn't require a ladder to easily enter and exit.

At the entrance above, that one-cubic-meter rock, after micro-level precise machining in the engine room space, could seamlessly fit into the hole in the wall.

For the entrance to the underground space, he had no plans to use a Cultivator's methods; with his strength, using rocks to block it was more reliable than any Cultivator technique he could muster.

He intended to make the underground space about one hundred square meters with a three-meter ceiling, which should suffice.

According to IBMz15's calculations, such a large underground space theoretically should be inside the mountain's rock mass, with sufficient support.

Li Shiming's ten-cubic-meter storage bag was not enough; he made several trips to dispose of the excavated rocks and earth outside Eagle Beak Island.

Surrounded by the sea, the rocks and earth were disposed into the water without leaving a trace.

Just as the copper corpse was completing the underground chamber with only a corner left to finish, the axe cutting through the rock suddenly broke through into an empty space.

Li Shiming, who was controlling the copper corpse through the Blood Covenant, sensed something was amiss and immediately stopped the axe.

He approached the rock, took out the Fiery Flame Sword again, and cautiously cut through the rock. In the last corner of the underground chamber, he uncovered a natural-looking entrance, devoid of any signs of artificial carving.

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He was a bit depressed, having dug through to underground space and not knowing where it led.

He took out a drone, put on the eyepiece, and with his limited cultivator methods, he could only use technology to explore.

He certainly couldn't let the copper corpse go down, could he? The copper corpse was very powerful, but who knew how deep it was below and whether it could make it back out if it fell.

The drone was perfect, capable of flight, and as long as it stayed within the range of the remote control, there would be no problems.

Even if it went beyond the remote range, the drone's built-in automatic return system would immediately return it back to him the same way it came.

The drone started up, heading downwards through the entrance, which was somewhat winding. The drone flexibly dodged left and right, descended over thirty meters, moved forward to the right for more than a hundred meters, and after descending about five meters more, the image in Li Shiming's eyepiece suddenly enlarged.

The drone activated its night vision capabilities, revealing an unimaginably vast space in the lightless underground.

The hundred square meter basement that Li Shiming planned to excavate was already not small, especially considering that Eagle Beak Island wasn't very large to begin with.

But who would have thought that beneath Eagle Beak Island, there would be such a massive space.

No, this wasn't under Eagle Beak Island; it was under the sea. The location and depth had already left Eagle Beak Island and extended under the sea surface.

Li Shiming grew interested in this underground space; he wanted to build a technological base and felt a hundred square meters was feeling a bit cramped.

He controlled the copper corpse to enlarge the natural hole downward and straightened it out enough for him and the copper corpse to enter.

It didn't take long for a new channel to be smoothed out, and at the location of the underground exit, he dug out a platform for rest, with Li Shiming standing atop it.

The underground space was extremely dark, so he took out a lamp. It was a technologically advanced battery-powered product, a completely sealed light designed for use underwater.

This was also a product of boredom during cultivation; having been through underwater combat, he had considered all possibilities, leading to many ideas.

He tossed the sealed light into the underground space, which immediately illuminated the area.

With his vision, as long as there was a hint of brightness, he could see quite a bit.

The underground space was about the size of an indoor professional basketball court, with a pond of about thirty square meters in one corner of the space, while the rest of the ground was very dry.

"This isn't right. How does it stay dry under the sea surface?" Li Shiming mused to himself as he calculated the exact location of the underground space using an IBMz15.

If this underground space was sealed, how could the air remain fresh?

It's well known that air would turn fetid in a sealed space.

He took another breath of air, but his expression quickly became strange.
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Because with that breath, he felt that the concentration of spiritual energy in the air was unreasonably high.

This definitely was not the concentration of a low-grade spirit vein; it was about the same as the concentration of spiritual energy gathered by a Gathering Spirit Plate.

A low-grade spirit vein couldn't possibly have such a concentration of spiritual energy unless there was another spirit vein here!

The more Li Shiming thought about it, the more likely it seemed, and it also explained why the air in this sealed space was so fresh: a spirit vein has the effect of purifying the environment.

He jumped into the underground space; the ground was very hard, and he began to observe other areas of the space.

It was evident that the entire underground space was inside a single rock formation, with no cracks found, no wonder sea water couldn't get in.