Unrivaled Demon's Odyssey

"God of lightning, my arse," Nero chuckled.

"Your lightning is powerful. I must say," Thor uttered as soon as his body regenerated.

"And yours is too weak for a 'God of lightning'," Nero remarked with a smug look on his face.

"I guess… you are right," Thor nodded in a solemn voice.

"You should be glad that I don't have my trident with me, or you would be toast," Nero proclaimed.

"I should get serious too." Thor swung Mjolnir and tossed it into the air as he flew up in the sky.

SIGH!

Nero sighed and shook his head in disbelief as he muttered, "Another lightning attack."

The clouds rumbled once again, and a giant whirlwind of thunder roared in the sky that surrounded Thor.

Nero raised his brows and squinted his eyes, 'What is this feeling?'

"Why can't I control his lightning?" Nero murmured.

Nero had the ability to control whether, but for some reason, he couldn't control Thor's lightning, almost as if they didn't belong to this world.

With a zipping and slashing sound of the lightning cutting the clouds and the air, Thor launched the thunderstorm upon Nero.

Thor hovered in the sky and looked down at the ground that was now submerged into the sea: "I once killed two gods with this attack. If you somehow survived this attack, then I—"

"Congratulations." Nero's voice echoed in the sky.

Thor looked up to see Nero hovering in the sky with Harpe in his hand.

"You made me use my weapon."

Thor gulped down and tried to comprehend the situation.

'Who is this demon? And why is he so powerful?' Thor questioned himself.

"I bet you are thinking why or how am I so powerful; Am I correct?" Nero asked.

Thor's eyes widened as he panicked and asked, "Don't tell me you can even read minds."

"No. I can't. But I knew what you were thinking because every powerful entity I fought before— thought the same thing."

Thor frowned his face and tossed Mjolnir at Nero with the speed of light.

Nero thought he would cleave Mjolnir when it came near him, so he stood there and swung Harpe.

"...!"

Nero swung Harpe, but before he could cut it, Thor called Mjolnir back and tossed it with double the speed as before and started flying erratically around Nero.

"At least, you are using a different attack," Nero uttered excitedly.

Thor punched Nero that sent him across the sea. He bounced on the sea surface a couple of times but eventually balanced himself.

"Not bad, but not impressed."

Nero launched himself at Thor and punched him in the face.

When Nero jumped, the water from the sea spritzed to the sky, and it slowly poured down like rain.

Thor collided with a couple of mountains that shattered on impact, and he fell on an island. 

Before Thor could get up and plan his next attack, Nero came and tossed him into the sky. Then, he swung Thor by grabbing his leg and flung him into the space above the sky.

Nero reached to the top before Thor and punched him down from there. Then, he got to the horizon before Thor could land and punched him so hard that he traveled hundreds of miles.

Nero hovered in the sky and waited for Thor to come back: "Not impressed."

Out of nowhere, Thor appeared in the sky above Nero and threw Mjolnir at him.

Nero smirked and thought he could catch it, but he was buried on the island with Mjolnir on his chest and unable to get it off.

"Don't even try." Thor landed beside Nero and uttered, "No one other than me can wield Mjolnir."

"That's bullshit! I am more powerful than you, so every inferior weapon shall obey me!" Nero yelled in a demonic voice.

"Your soul is corrupted," Thor remarked.

"Because I am evil?" Nero scoffed.

"No." Thor looked into Nero's eyes and continued, "Because you are a demon."

Nero frowned his face and tried to cut Mjolnir with Harpe, but nothing happened.

"You may be powerful, but evil never wins against good."

Thor hovered in the sky and raised both his hands as dozens of whirlwinds filled with thunder appeared in the sky.

Thor launched all the whirlwind on Nero and watched the island being submerged into the sea with no remains of anything: "Rest well, demon. You weren't so bad after all."

"Unfortunately, I can't rest."

Thor sighed in annoyance and uttered without looking up in the sky, "How did you manage to escape? As long as Mjolnir was in your body, you shouldn't be able to—"

"I forced my body?" Nero answered with a question.

"But for that you… your ribs and chest—"

"So?" Nero shrugged his shoulders and replied, "Do you think I can't regenerate?" 

Nero raised Harpe in the air and asserted, "Your last attack was impressive, but I am still not impressed."

The clouds vanished, and an enormous magic circle— covering the entire sea appeared in the sky.

'Forgive me, my love. I might not be able to fulfill my promise.' Thor gulped down in fear, and his face showed true terror.

Countless lightning spears, swords, chains, arrows appeared from the magic circle in the sky, and they shined different lightning; some were red, some were yellow, some were green, while some were black, and some were white.

Nero raised his finger and launched everything at Thor.

Thor tried to escape and called Mjolnir, but there was nowhere to go as Nero had covered the entire sky.

The arrows, spears, swords, and chains hit Thor one by one as his body was obliterated into pieces. He regenerated again, only to die again and again.

Nero raised his hand in the air, and a huge blue-colored lightning bolt conjured in his hand: "Just die while I am going easy on you."

He threw the lightning bolt at Thor, hoping he would finally die, but Thor consumed Mjolnir and clapped his hands; then started moving his finger in a strange manner, almost as if he was casting a spell without speaking a word.

SIGH!

Nero sighed in disbelief and uttered, "Are you kidding me?"

A white-colored Tribulation emerged from the sky and ate the lightning bolt, and every lightning Nero launched on Thor.

Thor looked up at Nero and said, "This is my final attack, and if you can survive this, then I have nothing more to do."

The Tribulation traveled through the sky towards Nero with the speed of light and opened its mouth to eat him.

Nero consumed Harpe, but he was still floating in the sky as though he had achieved the ability to fly: "Still, not impressed." 

Nero clapped his hand and moved his fingers the same way Thor did, but it lasted much longer. The sky rumbled with an ear-piercing howl, and Thor's Tribulation was sucked into the air.

"...!" Thor's face turned pale as he saw the sky cracking and a pair of red eyes shined inside it.

Soon, an enormous face of Tribulation came out of the crack and hovered behind Nero.

The rest of the Tribulation's body was behind the crack, and it was so large that it had wrapped the entire realm with its body.

Thor trembled as the cracks grew wider and wider, and the presence of the Tribulation increased. 

"Just… who are you?" Thor asked as he stuttered on his words.

"I am…" Two black stripes covered Nero's right side of the face— passing through his mark on the cheekbone and his eyes. The sky shattered as an endless and never-ending body of the Tribulation emanated. The weather turned dire, and the air turned into a storm. Nero gazed at Thor with a lifeless glare in his eyes as his hair and clothes swayed with the air: "...Son of Zagan."