Ten Days and Ten Nights

"Nightmare Brat, are you so hungry you're too weak? You don't even have enough strength to tickle me!" Kaido raised his heavy fist, which was covered in Armament Haki, and clashed violently with the Seven Star Sword in Roy's hand. The air exploded with a loud bang, and the raging shockwave pushed the two of them backward.

For a monster like Kaido, covering his entire body with Armament Haki is an incredibly simple matter. Moreover, someone like him who has reached the pinnacle of pure Body Technique has an almost inexhaustible Armament Haki within him.

Therefore, when he concentrated all the Armament Haki in his body into his right hand, it was like putting on an indestructible gauntlet. Even when he directly confronted Roy's Seven Star Sword, it only left a few scratches on his right hand, which were completely healed in the blink of an eye.

As for Kaido club? It was long ago annihilated by the sharpness of the Seven Star Sword.

After all, swords are the mainstream in this world. Even Kaido's spiked club is at most made of the material of Great Grade Sword. In addition, Kaido doesn't know how to cherish things and always chooses to fight Roy head-on. After smashing Roy countless times, the spiked club in his hand shattered and turned into dust.

However, for a monster like Kaido, losing his weapon is not a significant issue at all; his most powerful weapon is his body.

"I really underestimated you." Roy didn't even raise his eyelids, took a deep breath and said, "Let's try this move next."

Roy adjusted his breathing and once again maximized his speed advantage and Observation Haki, instantly appearing in front of Kaido.

Just as Kaido was about to cross his arms to block, Roy opened his eyes wide and released his Conqueror's Haki and Dream Tsukuyomi at their peak, impacting and eroding Kaido's will.

With this two-pronged approach, even Kaido was stunned for a moment, frozen in place as if petrified.

For a powerhouse like Roy, even a momentary lapse in concentration can influence the course of the entire battle.

The Seven Star Sword, enveloped in Armament Haki, pierced through Kaido's body with unstoppable force, leaving a horrifying hole in his heart. Eerie green flames burned at the edges of the wound, and from Roy's perspective, he could even see the world behind Kaido.

"Kai... Kaido has been killed! Even the so-called immortal monster has to be destroyed one day?"

"With his heart shattered, there's absolutely no way he could have survived such an injury!"

"In the clash of sword and shield, we swordsmen have ultimately emerged victorious!"

Just as the Master Swordsman of Wano Country were cheering, some who remained sober noticed that the Three Calamities under Kaido's command did not change their expressions at all, as if Kaido's heart being pierced was just a common occurrence. Thinking of a certain possibility, they felt a chill run down their spines.

"Something's not right. Aren't those Beasts Pirates afraid of the reckoning after the Nightmare Battle? Or... is that monster not dead at all?"

Roy, having mastered his Observation Haki to its fullest extent and foreseen a fragment of the future, was horrified and immediately prepared to retreat without hesitation.

However, Kaido faster than Roy had anticipated.

"Ah..." Kaido roared angrily, swinging a heavy punch at Roy with superhuman speed.

Fortunately, Roy foresaw this in time, and the Seven Star Sword he drew from Kaido's chest struck Kaido's right hand before it could strike, resulting in a stalemate where the two were evenly matched.

Ignoring the horrifying hole in his chest, Kaido blocked Roy's descending sword with his right hand, and his right leg, enveloped in Armament Haki, lashed out like a whip.

Roy, who was kicked by Kaido, dissipated like smoke and instantly reappeared above Kaido, wielding the Seven Star Sword to slash at Kaido's head. Kaido, on the other hand, moved like a bow and his fists flew upwards like a spring.

Boom!

The terrifying recoil sent Roy flying into the sky, while the ground beneath Kaido's feet completely collapsed, swallowing him up.

This series of unexpected events left everyone breathless and their minds in a state of utter disarray.

"Even the destruction of his heart had almost no effect on him. Is Kaido really human?" Crocodile the Sand gave Kaido a deep look and asked the Three Calamities who were standing peacefully to the side.

After the last battle, they had roughly figured out their own positions. Taking Drought Jack as an example, Crocodile the Sand was slightly weaker than him, Enel was three points stronger, and as for Issho, he was naturally far superior to Jack in his prime, but Augustine could not exert the full power of this body and could only be on par with Jack.

Overall, the Three Calamities might have a slight advantage, but if a winner were to be determined, it might take three days and three nights to reach a conclusion. Therefore, both sides tacitly chose to cease hostilities.

After all, the outcome of this battle will not be decided by them, but by those two monsters who have already destroyed a significant portion of Wano Country. Rather than wasting time, it would be better to carefully observe the battle between Roy and Kaido. Battles between the Four Emperors are extremely rare, and missing even a single moment would be a sin.

"I admit Nightmare Roy is indeed powerful, but he's a hundred years too early to defeat Kaido," Wind Ulysses said dismissively. "Neither the Marine Headquarters nor Whitebeard could do anything about Kaido because they were facing an immortal monster!"

Roy had been sent flying into the air, seemed to defy the laws of motion and hovered there. Looking at Kaido's heart that was forming and the wound that had shrunk by half, Roy couldn't help but curse, "Damn it, Kaido, how can he not die after all this? This guy is a true monster."

In fact, Roy also noticed that Kaido's momentum was somewhat weaker than before, which showed that this fatal injury was not without its effects on him. If they could continuously shatter his heart or head, there might be a way to truly kill Kaido.

As for how many times this "continuous" would be needed, Roy conservatively estimates it to be over a hundred times. Even if he and the other three Great Sea Emperors joined forces, they might not be able to achieve it a hundred times in Kaido row. Therefore, this idea is simply impossible to realize.

"Nightmare Brat, besides that old man Whitebeard, you're the first person who could destroy my heart single-handedly. I must say, you certainly deserve to be considered someone on the same level as me!" Kaido. "Therefore, I will definitely use all my strength to kill you!"

"In that case, we'll just have to stick to the original plan." After hearing Kaido's provocation, Roy said mockingly, "If I can't beat you to death, I'll disgust you to death!"

Knowing he couldn't kill Kaido, Roy abandoned his unrealistic plan and opted for a harassment guerrilla strategy instead.

It's important to know that even when Kozuki Oden wasn't at his peak, he could still use his speed advantage to hold off Kaido. When Roy decided to stop confronting Kaido head-on, Kaido's nightmare began.

From that day on, Kaido's roar never ceased on the territory of Wano Country.

"Nightmare Roy, are you a coward?"

"Damn scum, if you're so capable, stop running around like a monkey."

"Damn it, fight me head-on!"

"Ahhh..."

Kaido's nightmare lasted for ten days and ten nights.