Xiao Yu dug through the ground, lifted the portable digging machine, and after looking at the broken hole, Xiao Yu, who felt that it was too small, placed the digging machine again.

Another thump of vibrations sounded, and it didn't take long for another big hole to appear in the sky above the Black Goblin Castle.

After opening several holes in a row, Xiao Yu felt the trembling of the ground, and stepped back with the digging machine on the slope made of the silt he had dug out with a sapper shovel.

Rumble!

With the sapper shovel held by Xiao Yu smashed hard!

The bottom of the deep pit, which had long been riddled with holes, suddenly could no longer bear this last straw, and all of it fell off with a hula, bathing the inside and outside of the Black Goblin Castle in a huge rain of falling rocks.

Xiao Yu stretched out his head to look, only to see that the black goblin castle in the smoke and dust had already collapsed, and there were ruins and boulders everywhere, and the original outline of the castle could hardly be seen.

Xiao Yu noticed that the location of the Black Fairy Castle under the ground was a karst cave structure.

It is about 20 meters long, nearly 10 meters wide at its widest point, and more than a meter high, and then the rest of the place is a thick rock wall.

With such terrain, it's hard to go down even if you dig it up!

But...... You don't need to go down on your own.

The wizard apprentices in the Black Goblin Castle and those Black Goblins also suffered heavy casualties, and only a few strong ones relied on various means to keep some of their living forces.

"It's a giant! It was he who broke the sky! ”

The ceiling of the hall where the Black Fairy King was located had long since been smashed into the open air ruins, and most of the upper echelons of the Black Elves next to the throne were wizards or wizard apprentices, and they joined forces to block the falling boulders, but they felt weak because they saw the broken hole.

"How could it be from above?" The vice president only felt that Lady Luck was moving away from him, why did the giant take his army so unexpectedly?

"No matter what! Fight! The vice dean's eyes flashed with a look of madness, and he raised his staff.

When the wizard apprentices around him saw the vice dean like this, they all had to raise their staffs in unison and transfer their mana to the vice dean in the same way as they had been trained.

Relying on the strength of everyone, a huge wind with a widest diameter of more than fifty meters in the eyes of the villain rushed out of the ground with countless sharp and cold ice chips.

"It's an ice storm! A simplified version of the first level of the second-level witchcraft blizzard! Aynodia sensed the fluctuations of witchcraft underground, and hurriedly reminded Xiao Yu.

"I saw it!" Xiao Yu had already been able to see the large ice storm gushing out of the ruins underground.

"Drink!"

After the transcendental, Xiao Yu let out a low sigh, easily raised the digging machine with both hands, and aimed the direction of the drill bit at the entrance of the hole.

As soon as the ice storm reached the exit, Xiao Yu started the machine, and with a frantic turn, he immediately broke through the structure of the ice storm and the wind, scattering it all around.

Xiao Yu noticed the spreading ice storm, covering the rocks around the cave entrance with a layer of frost.

Even if he was wearing an explosion-proof suit, Xiao Yu could still feel that the air around him was much cooler.

If such witchcraft were to act on an ordinary person who had no defense, I am afraid it would really cause him severe frostbite!

"Come and don't be rude!"

Xiao Yu leaned the digging machine against the mound, took out the moon-chasing crossbow on his back, and at the same time, took out the two firecrackers in the carry-on space, which were obviously much larger, and hung them.

These two firecrackers are not ordinary firecrackers, their full names are earth-shattering, also known as the king of the ring, it is reported that the sound is as loud as thunder, and they can blow up all the fish in the lake and knock them out.

Xiao Yu had no place to use it when he bought it, and when he saw the environment of the underground world, he suddenly had an impulse.

After igniting, Xiao Yu hurriedly shot a crossbow arrow.

"Whew!"

The crossbow arrows fired from the Moonchaser whizzed past and thud in front of the Black Fairy King's throne.

The black goblins moved quite quickly, and the accuracy of the crossbow arrows also affected after they were earth-shattering, so Xiao Yu didn't deliberately aim at them, so they all dodged the arrows.

"What's that?" The Black Goblin King on the throne was still trying to pretend to be calm, when he heard a group of men muttering.

He also looked at the ridiculously long crossbow arrow in the middle of the original hall, and saw that it was hanging from its body, a gray cylinder that was difficult for ten black goblins to encircle.

"It's an alchemy bomb!" The vice president was far away, but he also saw the earth-shattering firecracker clearly, and while instinctively retreating, he loudly issued a warning.

The upper echelons of the black goblins still knew about the alchemy bomb, and when they saw this thing so big, they screamed in fright.

"Run!" There were black elves shouting loudly.

"It's too close~ I can't run! I can only give up on you! The Black Fairy King no longer hesitated at the critical moment, the black light on its body flashed, and the surrounding dozens of black goblin upper layers immediately screamed, and their bodies exploded into black mist, shrouding the Black Fairy King's throne.

"Dark Sorcery ~ Sacrifice Guard!" The vice president who escaped saw this scene, his eyelids jumped wildly, this is extremely vicious, relying on the curse on his subordinates in advance, and then when he needs to sacrifice the mana and soul of his subordinates in exchange for temporary protective mana!

"Vice Dean! You ......" was outside the castle and avoided the most dense falling rocks, and was about to arrive when he saw the deputy dean fleeing in a panic, and couldn't help but ask.

"Run!"

The deputy dean glanced at the apprentice who had impressed him, and reminded him as he accelerated his flight past the other.

"Run?"

The third-level wizard apprentice was slightly stunned, and immediately saw the crossbow arrow that was inserted into the ground about seven or eight hundred meters away.

And the huge cylinder that disturbed him!

"It's seven or eight hundred meters away from there!" The third-level wizard apprentice thought like this, "There should be no problem, right? ”

That's it!

About two seconds after the bolt fell......

Rumble!

An impossibly loud bang erupted from the cylinder where the bolts had exploded!

It's a sound far beyond this world!

It was a loud bang that made the air around it seem to turn into a real thing in an instant!

The sound swept through every inch of space around it in an instant, and it seemed that these voices had completely gone berserk, and they all wanted to rush out in a frenzy!

However, the structure of the underworld makes the space where the castle is located a karst cave, and the passages connecting the other underground areas are not only small in the corners.

Most of the surrounding walls are rocky, which restricts the sound from going out, and at the same time, it also enhances the power of this wave of explosions in disguise!

The Black Fairy King's sacrificial magic failed to save its life, and the black mist was blown away the moment it came into contact with the loud noise, and the Black Fairy King's whole person was thrown out like a grain of sand by the loud noise, disappearing into the echoes.

The rest of the black goblins, wizard apprentices, and even the vice deans, no matter how fast they escaped, as long as they were still in this underground space, they were all swept away by the loud fluctuations, and they couldn't bring the slightest ripple of resistance.

Xiao Yu also climbed out of the pit quickly with a pit digger after archery, even so, the roaring and loud airflow that rushed out of the hole after the loud noise still made him a little embarrassed, and felt a little tinnitus.

As for the onlookers on the edge of the pit, one by one was not much better, even if Xiao Yu said hello in advance, they were still shocked to the ground one by one, covering their ears, extremely sad.