Chapter 694 Tremors in the Darkness

Not long after Arnold and the others left the camp, Joan, Hylar, Audrey, and Holden also broke away from the large group that was about to turn back the same way and continued to explore.

Joan surveyed the surrounding terrain with the help of the "navigation compass", and found three tunnels leading to the deep underground space near the camp within half an hour.

According to the three-dimensional picture displayed by the navigation compass, Joan carefully compared the three tunnels, and finally chose the one with fewer twists and turns and seemed the safest, and led his teammates to drill down from its corresponding "ground umbilical" to start a deep underground exploration journey of.

In the early stage of the "Ground Navel", the tunnel space is still relatively wide, allowing four people to walk side by side.

As it continues to go underground, the tunnel gradually becomes narrower, and many places can barely pass through by one person.

For the sake of safety, Hyrule walked in the front to explore the way, Holden followed closely behind, Joan walked in the middle of the team, and Audrey was in charge of breaking the back.

The four of them rode ground lizards through the eerie and winding tunnel.

The area outside the lighting of the miner's lamp is completely shrouded in darkness, making people gradually forget the passage of time.

The tunnel is like a necklace, connecting countless high and low underground caves in series. Swarms of bats hung upside down on the dome of the cave, disturbed by the light from the miner's lamp, they flapped their wings and swooped down from time to time, circled above Joan's head and flew back to the dome.

Joan took the rein and steered the ground lizard slowly through the rugged tunnel, sometimes looking up at the dome of the cave.

Among the four-member team, he was the only one who didn't have a magic miner's lamp on his helmet.

With the "dark vision" enchanted by the prosthetic eye, he can see clearly the scene in the cave without the need for light.

The flight trajectory of the bat aroused Joan's curiosity.

These nightcrawlers who live in the dark have poor eyesight and extremely keen hearing.

Joan once read this statement in a book: When bats fly, they will continuously make sharp calls, and then collect echoes through their ears, and judge the position and size of nearby objects based on the echoes, as well as whether the objects are moving .

With the help of echolocation, bats can fly at high speed in the dark without hitting any obstacles.

If this statement is true, Joan naturally has an association: as long as the mouths of bats are plugged so that they cannot make sounds, they will lose the ability to distinguish directions.

Just as Joan was lost in thought, another bat flew past it.

Joan pricked up his ears and listened carefully.

It's a pity that there is only the sound of bats flapping their wings, but not the chirping that they rely on for positioning.

Joan frowned, thinking that her hearing was not sensitive enough.

Fortunately, he knew a spell that could sharpen the senses including hearing.

Thinking of this, Joan softly chanted an incantation that symbolized the "horn".

"Roma!"

The third-ring prophecy spell "Tremor Perception" attached to the prosthetic eye was quietly activated, and Joan's skin and senses immediately became extremely sensitive, and he could clearly sense the slight ripples in the surrounding air.

When the bat flew past him again, a miracle happened!

Joan actually heard the high-frequency sound waves from the bat's mouth - under normal circumstances, human ears can't hear such high-frequency sound waves at all.

Joan simply closed his eyes and felt the outside world through his ears and skin.

After closing the eyes, the outside world loses its color and becomes clearer and more vivid.

Bats, fireflies, and rats jumping out of the trench, all creatures are releasing waves to the outside world, causing light or heavy tremors in the air.

Joan can feel these wonderful tremors, and can even deduce the outline and location of creatures based on the fluctuations that cause the tremors like a bat.

It is difficult to describe in words the wonderful feeling of "observing" the surrounding environment with the body instead of the eyes.

Everything is perfect except for the lack of color.

At this time, an unusually strong airflow suddenly blew from the cave ahead.

Joan's ears trembled slightly, and a slight shudder appeared on the surface of his skin.

Tremors in the air indicated that a swarm of bats was coming head-on along the winding tunnel. When they emitted sound waves, they also revealed their existence to Joan.

"Shock Perception" is like a meticulous brush, sketching the outline and location of the group of bats in Joan's mind.

These bats are physically stronger than their more inviolable relatives.

A pair of needle-shaped tusks growing on the jaws indicate that they are extremely ferocious predators.

"Be careful!"

Qiao An suddenly opened his eyes and reminded his companions in a deep voice.

"60 yards ahead of the tunnel, a large group of vampire bats is approaching us!"

Hailar, who was walking at the forefront, immediately stopped and stared ahead vigilantly, when he heard the sound of flapping wings.

Just a few seconds later, a group of dark red bats rushed out of the darkness, screaming and breaking into the detection range of the miner's lamp, like a hovering cloud of blood, flying towards the light.

"Alcar!"

Hailar, who had been on guard for a long time, chanted the spellcasting incantation, raised his hand and blasted out a seven-color light cone.

In an instant, the narrow tunnel was almost completely filled with the "colorful jet" erupted from Hailar's palm.

The vampire bats bumped into the colorful light cone head-on, and before they had time to show their fangs, they were shocked by the spell, and they fell into the sky like rain.

At the same time as Hyrule cast the spell, Holden, who was not far behind, pulled out his saber, drifted past her like a wisp of smoke, and slashed repeatedly with the sword.

In the dim tunnel, several cold lights suddenly flashed.

The vampire bats that had just been stunned by the "Colorful Jet" in mid-air were cut in half by the short sword that was as fast as the wind before they landed.

"Little rascal, your sword skills are not bad." Hailar glanced at Holden, "It's a pity that you are more than gorgeous, but not practical."

"I don't like to hear your words! Swordsmanship is also an art. In my opinion, 'gorgeous' and 'practical' don't conflict." Holden retorted eloquently.

"It's useless to say that it's beautiful. A big bat is flying over from the opposite side. Let me show you what is the real swordsmanship suitable for actual combat!"

Hailar held the wave-bladed giant sword slanted behind him with his backhand, and used the beam of light projected by the miner's lamp to illuminate the tunnel. An exceptionally large black bat was approaching at high speed, with its half-open mouth showing thick fangs.

"Sister Cai Fan, be careful! That seems to be a 'violent bat'!" Holden's face changed slightly.

Hailar smiled confidently, calmly drew his sword, and swung it vigorously at the vicious bat that was rushing towards him.

In her expectation, this sword was enough to split the ferocious bat in half, but she didn't pay attention to the terrain restrictions. The giant sword was caught by a crack in the rock just as it swung to the top of her head!