Recording the mural on the wall next to the doorpost, Jiang Feng turned on the tactical flashlight hanging on the electromagnetic rifle and walked towards the depths of the ruins to explore the past.

The granite steps descended as if there were no boundaries, and after walking for almost half an hour, they did not reach the end. Jiang Feng had been paying attention to his current depth, as well as the oxygen content of the nearby air, but he was wondering if this passage would lead to another world.

But what he feared didn't happen, and after another hour of walking, his right foot finally landed on a wide square.

"At a depth of 1,074 meters, what do you want to do to build the palace so deep underground?"

Jiang Feng moved the tactical flashlight under the muzzle of the gun and looked at the hall located underground.

Traces of pickaxes can be seen on the walls of the main hall, rusted carts and steel-forged pickaxes in the corners, and bronze pipes covered in turquoise lines, which indicate that these dwarves entered the age of steam two thousand years ago.

Taking his eyes off the pile of things under the corner, Jiang Feng looked towards the giant granite door directly in front of the main hall. He saw the same fresco carved on the door panel as he had seen at the entrance to the ruins.

"Is this the main entrance to the ruins?"

All the magical elements of the entire secret realm poured here, and were sucked into the space behind the door, and it seemed that the secret of Day Zero was hidden behind this stone door.

Thinking in his heart, Jiang Feng summoned the remaining magical elements around him, took out a sticky bomb from the spatial ring, stuffed the magnetic track from the side, and then aimed at the granite giant door in front of the main hall, and pulled the trigger.

I heard a bang, and the stickybomb hit the center of the giant gate. Jiang Feng, who had already recorded the murals on the slate in his brain, started the blasting procedure without hesitation.

"Boom ——!!!"

The rubble from the ceiling shook, and the ground shook with a loud noise, and the granite gate collapsed in the billowing dust.

Feeling the surging magic element behind the giant door, Jiang Feng was secretly surprised in his heart, the magic element that seemed to exist as a physical entity even formed a colorful aurora in the space.

At the same moment, however, a terrible siren came from the space behind the door.

"Warning, intruder spotted!"

"Warning, intruder spotted!"

The sound echoed in the bottomless hollow valley, and I saw a bronze robot, dragging a clumsy body and a two-handed war hammer, like a tank running at full speed, crashing into Jiang Feng who was standing at the door.

"Inscription puppet!"

Jiang Feng's pupils contracted slightly, although he was surprised, but there was no fear on his face.

The surging magic overflowed from the space behind the door, and standing in front of the door, he could already sense it with the tentacles of spiritual power.

Without any hesitation, Jiang Feng chanted a spell in his mouth, and his index finger pointed forward.

With the shaking of the earth, a granite wall rose from the ground, blocking the bronze robot's path.

"Stone Wall!"

Boom ——!

As it was about to crash into the solid stone wall, the robot's head let out a dull roar of hitting the bell, and the war hammer in its hand slammed into the granite wall.

Milky white steam erupted from the pipes at the back of the hammer, and the blunt side of the hammer seemed to be accelerated the moment it touched the wall, tearing the unbreakable granite wall apart.

And the hammer was frozen in the billowing dust, and the flat hammer surface was facing the river wind.

"You can even break through the one-star defensive sorcery!" A trace of surprise flashed in Jiang Feng's eyes, and he didn't dare to hesitate, and pinched out three test tubes containing corrosive and strong acids in his right hand.

However, at this moment, an alarm suddenly rose, and Jiang Feng almost instinctively dodged to the side.

I saw the hammer frozen in the air, and the back suddenly spewed milky white steam again. The originally flat hammer surface was like a fragmentation grenade, and it exploded forward, smashing the debris forward, and swept across the area in a fan shape.

A fist-sized piece of iron slammed into the shield constructed by Jiang Feng's barrier ring, spreading out ripples in circles. Fortunately, he dodged the center of the explosion in time, only to be wiped by the aftermath of the fragments, otherwise this blow alone would have been enough to destroy his barrier ring directly.

"I didn't expect that it was not only the inscription technology, but also the steam power technology integrated into the inscription puppet."

"Shield Energy Cost 60%...... It is worthy of the masterpiece left by the dwarves in ancient times. ”

"But that's the end of it!"

Jiang Feng adjusted the output power of the electromagnetic rifle to the maximum, stuffed a needle-shaped ammunition from the side of the breech, and then aimed at the bronze metal tube under the shoulder of the robot, and pulled the trigger.

A huge recoil force came from the shoulder, and at the same time, the sudden spray of needle-shaped metal ammunition left a scorching orange trail in the air.

Knock ——!

There was another muffled bell ringing.

The steam robot, which was more than four meters tall, staggered backwards two steps as if it had been hit by a truck. The mass bullet that slammed into his shoulder instantly unleashed a needle-like jet of metal forward, melting all the copper pipes beneath his armor and blocking the flow of steam.

"Warning, steam power system is malfunctioning."

"Warning ......"

The dull sound of the alarm stopped abruptly, and the hot steam erupted like a torrent, covering the entire bronze robot in an instant, and fist-sized rivets flew out, and the huge body collapsed with a tooth-sore metal grinding sound.

"That's it."

Jiang Feng let out a sigh of relief, replaced it with a new battery, reloaded the rifle-mass bullets under the magnetic track, and then walked towards the corpse of the steam robot.

"Combining the technology of the materialistic side with the technology of the idealistic side, although it is only a very low-end technology, there is no lack of merit in it."

"Don't know what the core of its power is? It can't be burning fossil fuels. ”

Taking out a dagger, Jiang Feng pressed the switch on the side of the dagger.

The dagger's edge emitted a pale blue arc of light, which was the light released by the hot inert gas. I saw that the dagger that pierced the robot's chest was like a soldering iron piercing into the snow, disintegrating the impregnable defense without any resistance.

After cutting seven or eight knife cuts on the remains of the robot, and after venting the high-temperature steam, Jiang Feng finally found the position of the power core.

It was a crimson orb encased in a titanium metal bar, the size of a billiard ball. The slow-flowing surface resembles lava, like lava that never cools.

"Lava core! I didn't expect this thing to exist. Looking at the things in his hand, Jiang Feng's eyebrows raised a trace of interest.

Legend has it that some planets with a high abundance of stardust may generate a special mineral called a lava core in a magma flow deep within the Earth's core. It is difficult to prove the reason for its formation from the point of view of physics, it is like a torch that never goes out, endlessly releasing its own heat.

The energy contained in such a lava core is enough to evaporate the entire Lake Saysey......

"I see, use this thing to heat water into steam, and then through a special inscription circuit, a part of the steam power is converted into magic, so as to drive the entire inscription puppet action, from the power system alone, the energy provided by a lava core may be even greater than that provided by a tritium battery of the same volume!"

Jiang Feng collected the lava core into the spatial ring, scanned the inscriptions inside the steam robot, and then stood up from the robot's chest and continued towards the broken stone door......