Thanks for the invitation. I'm in Type-Moon, inheriting the legacy of Zi-O.

Compared to its initial appearance, the sphere of light is now much smaller, probably only about three meters in size.

However, at this moment it seemed to have come to life, the white sphere of light trembling continuously.

Boom—another clap of thunder, white lightning shot straight into the sky, and the entire sphere of light exploded.

After the ball of light dissipated, a man who had been kneeling on the ground slowly stood up.

A thunderous roar erupted.

Singer of human mythology; inventor of thunderbolts surpassing Zeus

Looking at the man in front of them, Nianzhuo and the others fell silent.

“...Who exactly are you?” Holding a greatsword in one hand, Nian Zhuo stared warily at the man in front of him who was stretching his arm.

She had long, slightly green hair, a fluffy shawl, and modern-looking golden mechanical gloves that occasionally flashed with purple lightning.

What attracted Nian Zhuo's attention most was the pale green spherical object that was flashing on the right side of the other person's heart.

"—I was summoned." Stretching his arms, the man looked up at Nian Zhuo and his group, who stood ready for battle. "Who summoned me, who is as powerful as lightning? Who summoned me, a genius?"

"Is it a cry for help? Or a prayer?" Purple lightning flickered around the man, like a favored deity. "Is it good? Or evil?"

Looking at Nianzhuo and Ritsuka, who were filled with hostility in their eyes, and then at the messy surroundings, he nodded to himself.

"So that's it—is it all that summoned me at this moment?" In the blink of an eye, the aura around the man changed again, and his killing intent pierced towards Nian Zhuo and the others like a sharp blade.

"—! Get back!!" Nian Zhuo quickly gathered countless vines in front of him and once again shielded everyone around him behind him.

As soon as Nian Zhuo finished speaking, the man lightly stepped forward, and a bolt of lightning instantly shot towards Nian Zhuo, striking the vines and leaving a scorch mark.

"I have been summoned! I have been summoned the genius and the body of lightning! I am Nikola Tesla!" Stroking his smooth chin, the man who called himself Tesla turned to look at the massive steam engine atop the mountain. "How interesting. Have the scholars gathered here to summon me?"

"Summoned! The one who brings a new mythology to mankind! Summoned me, who surpasses Indra and even Zeus cannot compare?!"

"Hahaha, hahahahahaha—!" Just by laughing, Tesla's body crackled with electrical charges. He covered half his cheek as if he had heard a hilarious joke. "Hahahaha! How interesting! It really makes me laugh! Scholars!"

"Though I am a genius, I am also a superman who deeply loves the bizarre!" With a snap of his fingers, bolts of lightning as thick as bowls swirled around the other person's body. "Very well! As you wish! I, the embodiment of genius and lightning, will descend upon this world!"

As soon as he finished speaking, through the huge crater created by lightning above the man who called himself Tesla, Nian Zhuo and the others could clearly see that the originally gray sky outside began to darken because of the man's words.

Dark clouds, flashing with white lightning, gathered in the sky above this land, and the rumbling thunder echoed throughout the underground space.

"Hahaha!" However, he didn't make any move, but just covered his face and laughed uncontrollably, "Hahahahahahahahahahaha!"

"..." His gaze shifted slightly as he looked at Nian Zhuo, who was gradually unfurling the vines before him, a hint of interest appearing in his eyes. "I never imagined that such an interesting power existed in this world..."

With a snap of his fingers, five white lightning bolts instantly fell from the dark clouds in the sky, all striking Nian Zhuo's silver armor.

Boom boom boom boom—the deafening thunder didn't start until the lightning struck, a beat later.

When the lightning dissipated, Nian Zhuo's unharmed figure was revealed.

“…Hmm, not bad.” Tesla clapped his hands, turned and walked in another direction. “Feel honored that you survived my thunderbolt, which surpasses even Zeus’s.”

However, the sound of wind could be heard from behind.

"—Hmm?" Turning his head, Tesla saw an orange sword aura slashing straight towards him.

"—Ha, interesting!" Tesla grinned, extending his palm. Lightning surged forth again, forming a barrier that collided with the incoming orange blade energy.

In the blink of an eye, lightning and sword light exploded together, and the violent impact and intense light forced Mash and the others to close their eyes and retreat.

When she opened her eyes again, she was already some distance away from the two of them. This distance represented the absolute difference in power between Nian Zhuo and Tesla and Ritsuka and Mashu.

"Ugh..." Ryotaro wanted to step forward, but suddenly frowned and clutched his side. In the previous battle against the Demon Pillar, he had been bitten by Barbatos' black spikes while shielding Ritsuka from an attack, and he had not yet recovered.

"...What, so eager to die?" Tesla looked at Nian Zhuo's eyes, which were emitting a little black smoke, and his fingers rubbed together, with faint lightning flashing. "Although I disdain taking lives, I have no mercy for those who provoke me."

"...That's what I should be saying to you, Tesla." Gripping his broadsword tightly, Nian Zhuo pointed it at the man before him. "Get out of my way! As long as I'm alive, you won't harm this world in the slightest!"

"...Stop joking, you boring guy." Tesla's eyes suddenly widened as he sized up Nian Zhuo in front of him. He snorted and turned to leave. "Your own power is constantly weakening, yet you still dare to talk so arrogantly."

Damn it, did he notice? The greatsword in Nian Zhuo's hand became faintly illusory.

Dealing with Barbatos is taking much longer than expected, and Nian Zhuo's ultimate weapon is also nearing its end. He had originally hoped to use deterrence to buy some time, but now it seems there's no way to do so anymore—Nian Zhuo gritted his teeth.

"Stop talking to yourself! You blabbering bastard!" Then, unwilling to give up, Mordred swung his sword and instantly passed by Nian Zhuo.

"Hey! Mordred!" Seeing the blonde female knight rushing towards Tesla, Nianzhuo instinctively wanted to grab her.

However, Tesla was faster than him.

There was no need to even glance at it. Tesla, who sensed Mordred's attack through the electrical charge behind him, simply waved his hand, and a white bolt of lightning transformed into an arrow that pierced directly through Mordred's abdomen.

"Pfft—Ah!" Still in the sword-wielding posture, Mordred was sent flying backward by the lightning bolt that pierced her abdomen, only to be caught by Nian Zhuo, who was a step too late.

"Mordred—!" Mash was also caught off guard, but a sudden sense of crisis sent chills down her spine.

"...Do you even care about others?" As if the words exploded right next to his ear, Tesla flicked his finger, and white lightning descended from the dense dark clouds in the sky, heading straight for Mash.

"Ugh—Aaaaaah!" Although Mashu managed to react and raise her shield, the white lightning struck it directly. The lightning traveled along the shield's body, instantly rendering her unable to fight. Her trembling hands couldn't even grip the shield properly.

"Mash—!" Mordred, whose body had been paralyzed by the lightning, was gently placed on the ground. Nian Zhuo immediately rushed to Mash's side, checking her injuries. "...Are you alright?!"

"Ah...ahhh..." Stunned by the electric current, Mashu was trembling and unable to utter a complete sentence.

"—You bastard!" Turning around, Nian Zhuo deactivated the Fire Rope Orange DJ Gun from its greatsword mode and pulled the trigger towards the departing Tesla.

The orange bullets were fired at the opponent, but the opponent easily blocked them all with lightning by raising his hand.

“Instead of stopping me—” Manipulating the electricity, he swept up the surrounding rubble and hurled it at the unarmed Ritsuka and Ryotaro.

"What!" Realizing the other party's intention, Nian Zhuo quickly turned his gun towards the stone that was attacking Ritsuka and the others and pulled the trigger, but he could only watch Tesla leave helplessly.

Not only that, when Nencho blocked Tesla's attack, the opponent deliberately manipulated a weak current to surge up the soil, imprisoning Mordred and Mash's bodies inside, with only their heads showing.

"—Wait until you can take care of them before you try to challenge me."

Having reached the bottom of the void, Tesla looked at the gathering dark clouds in the sky and spread his arms wide as if enjoying himself.

Lightning crackled beneath their feet as the opponent leaped lightly, propelled by the lightning, directly crashing into the ground, leaving behind only a crater several meters in radius.

"..." After smashing all the rubble that was heading towards Ritsuka and Ryotaro, Nencho turned around and wanted to remove the restraints on Mash and Mordred.

“…Ugh!” Suddenly widening his eyes, Nian Zhuo took a few steps toward Mash and Mordred before collapsing weakly to his knees.

His arm trembled uncontrollably as the DJ gun fell beside him, dissipating into specks of light.

"...Is the time up?" Exhaustion, pain, and a variety of other sensations returned to Nianzhuo's body in an instant, causing his limbs to tremble and his forehead to be covered in sweat.

The silver armor on his body gradually turned into colorful particles of light, and the Sengoku Driver at his waist also turned into specks of light and dissipated.

In the blink of an eye, all of Nian Zhuo's weapons and items disappeared.

“…Damn it.” Panting heavily, Nian Zhuo pinched his arm with one hand to stand up and staggered toward Mash and Mordred.

"Mr. Nianzhuo, are you alright?" Ritsuka supported one of his shoulders from behind. Although the girl's face showed obvious signs of strain, she still insisted on helping Nianzhuo walk towards Mashu and the others.

"..." Ryotaro clenched his fists, glanced at the spot where Tesla had disappeared, closed his eyes, murmured something, and then rushed over to help Nencho walk forward.

However, perhaps due to excessive physical exertion or because his body had not yet adapted, Nian Zhuo felt that his physical strength was recovering more slowly than expected. It took about five minutes before he was finally able to equip the Zi-O basic armor and break free from Mordred and Mash's restraints.

"Thank you." Mordred wasn't as awkward this time, nor did she complain angrily or anything like that.

After all, the absolute difference in strength was right in front of him. Although he clenched his fists unwillingly, Mordred remained calm.

She touched her abdomen; although there was no wound, the feeling of being directly pierced by lightning still left her with lingering fear.

"I'm sorry... Mr. Nianzhuo... and senior, I've let them down again." More than her own injury, Mashu felt guilty for not being able to help Nianzhuo and Ritsuka, and she lowered her head.

"Don't blame yourself, after all, the opponent's strength is undeniable." Stretching his still somewhat weak arms, Nian Zhuo, who had raised Tesla's alert level to the highest from the start, said, "That guy is definitely not an enemy you can face alone right now. Let us handle him. —By the way, Mary, have you been able to find out about the opponent's activities during this time?"

He activated his communication device and inquired about Mary of Chaldea.

"...Oh, I'm so glad you're all alright." Mary's furrowed brows finally relaxed, and she waved her hand dismissively. "Of course, we've been observing him ever since he appeared. Right after the summoning was successful... and while his seemingly nonchalant magic was blasting you away or crushing you under the rubble, the Heroic Spirit Nikola Tesla had already reached the ground and started moving across it. That was probably just a few minutes ago."

“…Nikola Tesla.” Ryotaro read the name, which was very familiar to him. “He should be a well-known scientist and inventor.”

“Yes, even in the world of magic, this guy is undoubtedly one of the most famous figures.” Mary nodded. During Nian Zhuo’s rest, she had already asked Roman to take out all of Tesla’s information from Chaldea’s database. She picked up a book and flipped through it. “If modern civilization is a mechanical civilization centered on electricity, then it can be said that he is the one who laid the foundation for it.”

“Although he also calls himself that…” Despite being reluctant to admit it, Mashu nodded, “but he might really deserve to be called one of the Star Pioneers.”

"Speaking of which... Nikola Tesla... isn't he from this era?" Mashu suddenly realized that the era they lived in seemed to be the era in which he was a genius. "He should have been living in this era, so how could he appear in this world as a Heroic Spirit, a Servant...?"

“That’s true, but there are indeed such cases in the past, one involving a human and the other a Heroic Spirit.” Mary tapped the table as she spoke. “But this time it has nothing to do with the human Nikola Tesla. All we need to do is stop him from manifesting as a Heroic Spirit. The powerful lightning that Nikola Tesla spontaneously emits contains substances that can instantly activate the magical mist. If he moves to an area where the magical mist is concentrated, the anomaly in London will expand exponentially.”

On the screen in front of me, the result of the simulation was that the red circle that originally surrounded London suddenly expanded the map several times over.

"This is not limited to London; the affected area could even extend to the entire British Isles. If it develops to that point, it will be virtually impossible for humanity to restore order to this singularity. The bottom line of human order will be completely destroyed, and human history will be cut off in this era."

"In other words... Machiri Zorgen's goal is about to be achieved." Nian Zhuo rested his chin on his hand, pondering a countermeasure.

"Hmph, as long as we defeat that lightning bastard before all this happens, it'll be fine, simple and straightforward." Mordred stood up from the ground and slung the sword over his shoulder.

“Originally, the heroic spirits that appeared in the magic mist shouldn’t automatically become enemies…” Mary gritted her teeth, even though she was still a little angry. “But Machiri, through chanting, gave him an effect similar to a berserk skill. He’s not a complete Berserker, but his ego and actions are indeed restricted.”

"But if we don't stop him, he might actually make contact with the demonic mist on his own."

“In that case…we have to stop him!” But after saying that, Ritsuka looked troubled. “But, it’s such a long way, how can we catch up with him!”

“…I have a way.” Nian Zhuo suddenly spoke, gripping the orange and white watch face tightly in his hand.

——Fourze

[Rebelling against my magnificent father] (What a rip-off!)

Shortly after Tesla returned to Earth, the same white rocket emerged from a large hole in the ground, spewing exhaust fumes.

...and then it stuck to the ground.

"Cough, cough cough...!" Ritsuka, Mashu, and Ryotaro and Mordred, who jumped down afterward, removed their hands from the rocket, their faces covered in soot. They quickly wiped the soot off their faces.

"...Hey, Nianzhuo, what's wrong with you?!" Mordred patted the rocket's shaft, complaining as he brushed the dust off his clothes.

"...Puff puff." The tail thruster made two symbolic sounds before gradually disintegrating, and Nian Zhuo fell to the ground headfirst.

"Cough cough... Mistake, mistake..." Nian Zhuo got up from the ground, touched his head which was a little sore from the bump, and then met Mordred's dissatisfied expression.

"However, although the experience wasn't great, it saved a lot of time..." Nian Zhuo's tone became extremely serious after just glancing down.

“…Eh? Is that how it is?” Ritsuka and Mash leaned closer to the pit and looked down. Then their eyes widened and they were speechless.

The area below the pit, right where they had just taken off, was now completely filled with monsters.