Overpowered Flashines

It took more time before they were able to enter the dimensional gate, requirements, and confirmation are issued and confirm before they got the chance to try the yellow level dimensional gate.

The siblings found themselves in a wide expanse of darkness, where one could see numerous ruined houses and buildings.

This scene reminded Kent of the news he watched about a small country in Europe that wasn't able to control a black level gate.

The gate appeared under the sewers passage of the country so, it wasn't notice.

No one knew how long the gate had been open active under the sewers, the moment the monsters came out, their numbers enough we're enough to overwhelm the entire nation.

In a matter of a week, the entire nation had overrun by undead's, not a single living being got spared. Until now, the said nation is known to have become an undead's abode.

It's nearby bordering nation's build up tall and massive wall, and in constant battle against the endless swarm of undead's.

The siblings entered an undead dimensional gate, their task it to clear the nearest undead settlements being led by a high rank undead.

The two are accompanied by two teachers; however, the teacher isn't permitted to intervene except when thing's turn into worst.

The two teacher, Erica and Kent, wear a mechanical wristwatch designed to monitor their every move inside the Dimensional Gate.

Moreover, they had a mechanic contact lenses installed in their eyes, responsible for recording their performance.

"Oh ho, an undead plane, so this is what an undead plane looked like in person, amazing."

Erica's excited voice rung, echoing throughout the silent undead plane.

Due to her noise, the closest undead we're alerted, seeing four living creatures in these group of normal undead's; 6 skeletons and 10 zombies immediately rushed.

Most undead are brainless creatures, only those high rank one's possessed a great deal of intellect to do decisions.

"Ho-ho, here they come."

Seeing the nearing group of lesser undead's, Erica's excitement plummeted.

Erica did some strange motion, as mana from her magic heart travelled straight to her hand, mixing itself to her already prepared magic circle.

Erica created16 Flame Javelins appearing beside her legs, circling them, in a perfect motion.

The circling motion stopped as…

Swoosh… Swoosh…

The flame javelins flew where she pointed her hand.

Using a technique to perfectly analyzes and control the flame javelins trajectory, Erica instantly burned 16 lesser undead's in a matter of a few seconds.

"These group of lesser undead are too weak, I wanted to fight to stronger one."

"Then let's scout the area in search for a stronger undead."

Kent stated, pointing to a direction west side of the group. To his proposal the teachers nodded accepting his suggestion.

The two teachers accompanied them, distancing themselves 100 meters afar from the siblings.

Erica's reckless behavior disappeared, she behaved herself, while Erica has a rough and cheerful personality, she knew when and where she should act in situations.

The two continue their journey, they've already move ten kilometers afar from the Dimensional Gate.

Now and then, lesser undead's sensing them would appear and try to attack them. Unfortunately, for these undead's, before they could reach the group they'll already been burned.

Inside a dilapidated run down ruined brick house Kent and Erica silently ensured the perimeter moving upstairs' for a better view.

One kilometer from their position, a massive hoard of undead's marching towards the Dimensional Gate is moving in large strides.

The hoard is large, however, no more than five high tier undead are on the hoard, a lesser lich, war coffin, jack hunter, baron vampire, and a mutated ghoul.

"This be a perfect target…"

Kent stated, smiling at the group of undead's.

Erica looked to her brother in an utter supper.

"Brother… what you mean?"

"I am going to attack this hoard, so just sit there and watch."

…!

Erica was speechless, while she loved fighting, she would always consider her safety.

The hoard is made of weak undead's, but their numbers are massive, enough to overwhelm an entire city.

"I advise you not to behave recklessly." One of the three teachers stated.

From two the teachers number increase by one, a new teacher appeared. This teacher isn't here to accompany the group, but someone assigned inside the Dimensional Gate.

In dimensional gates used by schools, there would be 8 teachers or 8 other people assigned to monitor the monsters or beast movements inside the Dimensional Gate's.

These people are called the octagon guardians, a group of people responsible for scouting dangerous areas ahead, mostly ten kilometers afar from the dimensional gate.

They've risk their lives monitoring Dimensional Gate's for 48 hours a day. One's an anomaly or an abnormally that's out of the norm occurs, these people would immediately send a signal to the outside.

"Don't worry…"

"Brother…" Erica looked at her brother in a worried expression.

"I got this, trust me." Kent wave his hand, signaling not to worry.

'It's been quite some time, since I did a flashy show.'

Crack… Boom…!

…!

"That kid, no way…"

The three teachers and Erica we're dumbfounded, to Kent's action.

He jumped high in the sky, then drive straight to the center of the undead hoard.

"Let me test my new technique."

Seeing a living creature in front, the ten's of thousand undead's didn't question where the man came from as they quickly rushed at Kent.

Kent motioned unsheathing his sword in a quick draw…

Destructive Tempest Technique, First Form, Severing Orbital Ring.

Time seemed to have slowed down.

The moment the sword slowly left its scabbard, an immense amount of green essence spread.

Swoosh…!

To the silent sound of wind passing, the standing undead's around him, had stopped.

Then next instant, more than tens of thousands of undead's had themselves severed in half, but before their bodies drop to the ground, a late green essence of tin light followed.

Swoosh… Swoosh… Crack!

The already cut in two undead's, then shattered into pieces the green essence destroyed every single particle in them annihilating them completely; not even leaving a dust behind.

Erica and the teacher's eye's almost pop out from its sockets out of surprised, before they could even react more than 80% of the undead's hoard died.

The teacher who's about to send a signal outside due to the large hoard dropped the device.

"Their too weak indeed." Kent stated to his risk watch acting as a radio.

"He'll, you're just insanely strong."

The three teachers shouted in unison.

…!

Hearing their shouts, Kent smiled, achieving his aim.

On the other hand, Erica at the top of the dilapidated house had her eyes shown a bright radiance, unable to move on to her brother's overwhelming display of power.

'Bro-Brother…'

Smiling widely, Erica looked at her brother's domineering image standing at the center of a clear area, an area one's surrounded by enemies.

'I'll be sure to surpassed you, brother.'

Erica thought, still smiling, she's both relief and excited to her brother's overwhelming prowess.

"Erica…" Kent called out.

"Yes…!"

"You can have your way to those that have survived."

"Ye-yes." Erica excitedly reply, jumping from the top floor straight to the bottom.

She didn't bother using magic to slow her descent, relying solely on her physical strength, copying her brother's badass looking actions.

Dust scattered…

Reaching the ground her eyes shown in bright gold shine, she then gathered mana infusing it to her foot.

The next instant, blue flames erupted.

Erica run straight to the group of remaining undead's, while running, she multitasked, manipulating a monstrous amount of mana from her three energy core's.

Smiling widely, she extended both of her hands, a vortex of mana gathered in two points. Followed by a large amount of pure energy flame and frost spears, rotating around from the top of her head to the bottom of her toes.

Ba-ba-ba-bang! Bang! Bang!

Erica released the large spears aiming to the gathering undead's, settling for a formation.

Two high undead's lucky survived the war coffin and baron vampire.

The flaming spears and frost spears shoot like a machine gun, yet the force it held is comparable to that of a mortar.

Moreover, it's elemental attributes taking effect, every attack cause wide range area splash damage, either burning or freezing the targeted and nearby undead's.

…!

"These siblings are in born monsters, even their parents aren't this insane."

"You know right."

"This combo of brother and sister, more like the opposite of their parents."

"Then, what are we here for?"

…!

"I feel bad for the monsters, who's the monster now?"

The three teachers murmur, as they watch the overpowered spectacle unfolding.

Their father's nickname is Golden Guardian, derive from his golden aura that can heal others in addition to his strong sense of duty to protecting the citizens. On the other side, their mother is called Gentle Flower, derive from her flower like beauty and gentle yet deadly way to the sword.

Both are SS Tier individuals.