One Piece: Lord of Calamity

"Roa, you're playing with fire! It seems you don't take me seriously! But never mind, it's customary in the underworld to say hello first!"

As Kaido unleashed his fiery breath, black fur sprouted wildly on Roa's body, and broad black wings unfurled. A massive tiger, over fifteen meters long, stood on the ground.

"Roar!!"

Unlike his previous sound waves, this one was forcibly condensed into a single surge, shooting straight into the sky like a comet piercing the heavens. The sound wave and the column of fire collided in the next instant. The sky shattered, and the terrifying explosion seemed to silence everything. The powerful shockwave even overturned and blew away carriages on the ground.

"What?" Kaido was quite surprised. This sound wave was mixed with Conqueror's Haki! Was it a move similar to Big Mom's abnormal sound?

"Dylan," Roa flapped his wings and rose. "Take everyone far away, don't let them get caught in this."

"Lord Roa!" Bullet urgently pleaded, "Please allow me to fight alongside you!"

"It would be too impolite to disturb an old friend's reunion, Bullet," Roa said with a laugh. "Next time, for sure."

With a powerful flap of his broad wings, he shot straight into the sky. "Come on, Big Brother Kaido, don't destroy this simple country. Come up to the sky."

"Hmph!" Kaido's enormous body coiled in the air, his four claws grasping the clouds as he pursued. While pursuing, his attacks didn't stop.

"Evil Wind!"

The Azure Dragon's body coiled, and massive wind blades swept towards Roa. Roa briefly turned his head, and patterns spread across the large horns on his head.

"Whoosh!!"

A fierce wind suddenly rose, and equally powerful wind blades met the attack! But these were larger, more numerous, and fiercer! Wind against wind, blade against blade. Amidst the roar, the sharp wind almost tore the sky apart. After piercing through Kaido's wind blades, more wind blades slashed towards Kaido.

"Oh, it seems that even with similar abilities, mine are stronger, huh?" Roa said with interest.

"Thunder!"

The Azure Dragon remained silent, only roaring. Its roar transformed into lightning, blasting apart the wind blades in mid-air.

"This is even more childish, Big Brother Kaido, Thunder!" Roa commanded. The sky obeyed, and dark clouds instantly gathered, then thick lightning bolts rained down like a sudden shower. Big Brother Kaido's meager lightning was instantly drowned by the rain of thunder, and his massive body had nowhere to hide in the lightning, instantly being covered.

"Aaargh!!"

Even with Big Brother Kaido's tough hide and Haki strength, he still screamed repeatedly from the bombardment of lightning.

"I'm truly underestimated," Roa said, a little helplessly. "Big Brother Kaido, please don't challenge me, a true natural disaster, with your weak abilities, okay?"

"Blast Breath!!"

The entirely black Azure Dragon suddenly shot out of the thunderstorm, and fierce flames surged from its wide-open mouth.

"I told you not to do that." Roa's eyes widened.

The flames from Big Brother Kaido's mouth instantly exploded, and the fierce flames roared as they spread, until they enveloped the entire Azure Dragon. It looked as if he had activated a fire dragon mode for him.

"Damn brat!!" Kaido gritted his teeth and roared, howling as he was burned again.

While both of them could generate elemental attacks, he released attacks like natural disasters, but what Roa generated was the natural disaster itself! Could this brat's ability be even stronger than the Azure Dragon Fruit? What a joke!

The massive Azure Dragon's body instantly contracted, the flames were pierced through in the next instant, and a black iron club trailing black lightning pierced through the sky.

"Thunder Bagua—"

Roa's body also instantly transformed into his hybrid form. With a flap of his wings, he too shot out, swinging his beloved sword, Tiger Soul, still in its sheath, which was also covered in a layer of black Haki.

"Eight Trigrams!"

Boom!

The iron club and the sword sheath collided instantly. A violent wind instantly swept across the sky and the land, and as powerful Haki clashed, black lightning crackled continuously. Roa flew backward like a cannonball. "What formidable Haki! The same move, I really can't win with it!"

"Hmph!" Kaido, stepping on his flame clouds, was as fast as lightning even in the sky.

"My Haki is still too far behind," Roa finally stopped himself, acknowledging the reality. He had only recently mastered Busoshoku Haki hardening; how could he confront Big Brother Kaido, who had even mastered Conqueror's Haki coating, head-on? His arm felt like it was about to break from that collision. Thankfully, his strength kept up, and his body was tough enough, otherwise, he might not have escaped unscathed from that attack.

Since that was the case, he drew his sword. The crimson blade unsheathed, and the air seemed to be dyed red. The entire sword instantly became moist, and red liquid dripped from the blade.

"Descending the Three Worlds: Infernal Descent!"

The iron club descended like a heavenly thunderbolt.

"Emperor Sword: Rupture Edge!"

Roa gripped his sword with both hands and swung upwards. The moment he swung, the ominous crimson light on the blade suddenly surged. At this moment, it seemed he was swinging not a blade, but a surging flamethrower.

Boom!

Black and crimson colors each dominated a portion of the sky. In the next instant, the two colors mixed into a chaotic sphere, followed by an explosion that shook the heavens.

Roa fell downwards. But he didn't forget to swing his sword. "Lion's Might: Thousand Valley Slash!!"

Each swing of the sword produced a massive crimson slash, hundreds of meters long, that shot into the sky. These slashes were entirely different from ordinary flying slashes, so viscous they seemed to be congealed blood.

"Kundali: Dragon's Prosperous Army!"

The iron club, swift as a storm, continuously blasted apart Roa's slashes in the sky.

"What's with that sword?" Big Brother Kaido roared as he stepped on his flame clouds, pursuing Roa. "Is that the sword you took from God Valley?"

"Pretty good, right? It's called, Tiger Soul!" Roa wiped his left hand across the crimson blade, and Tiger Soul's blade instantly burst with crimson light. "Next is an original move!"

Red energy rapidly spread, and in the blink of an eye, a dozens-of-meters-long illusory crimson greatsword was clutched in Roa's hand.

It turned out that the idea of Tiger Soul evolving infinitely was a boast; it also had its limits. Over these six years, Roa had already maxed out Tiger Soul's level.

After evolving to its limit, Tiger Soul naturally became sharper and could significantly amplify Roa's slashes and flying slashes, especially after Roa comprehended the 'Iron Cutting' realm and became a true swordsman, this amplification became even more astonishing.

The biggest change, however, was that Tiger Soul could release a special red energy, which Roa called "Blood Qi"—a real, tangible power similar to Haki!

"Uroguroro! You brat, to think you've become this strong!!" Big Brother Kaido laughed instead of getting angry. "Roaring Thunder Bagua!!"

Roa swung his forty-meter greatsword. "Tiger Devour!"

Boom!!

Crimson and black clashed again in the sky. Even with the considerable distance they had put between them, Dylan, observing from below, still felt the fierce wind buffet him, almost blowing him away!

"Lord Roa!" Dylan's eyes blazed. He truly was the man he chose to follow; he could already fight Kaido to this extent!

Roa continued to fall, crashing heavily to the ground, creating a crater dozens of meters deep. In the sky, Big Brother Kaido was also flying upwards, with a few not-so-shallow wounds on his body.

"So sharp?" Kaido felt the pain in his body, and his gaze became more serious. Even the dispersed slashes were enough to leave marks on him! That sword!!

"Hiss! That hurts like hell!" Roa flapped his wings and shot into the sky. "Even the captain never hit me this hard!!" His right arm was twisted; it was definitely broken. Even with Tiger Soul, he was still far behind. And Big Brother Kaido probably wasn't even using his full power yet. Even a twenty-seven-year-old Big Brother Kaido was terrifyingly strong.

While still far from the realm of uncles like Shiki, he was also far beyond what ordinary people could imagine.

Hmm, he's probably at mid-tier Quasi-Emperor strength! Not much different from the twenty-eight-year-old Yamato in the original story.

As for himself, without Tiger Soul, he'd be at high-tier Calamity strength. With his beloved sword, being at mid-tier Emperor-level subordinate strength should be no problem. Of course, this refers to his close-quarters combat ability.

Roa casually set his right arm straight, then took a deep breath. Black energy surged, and his injuries instantly began to heal rapidly.

"Big Brother Kaido, prepare to witness a true natural disaster!"