Arc 16From Rogrim to the Sky Archipelago

The Straw Hat Pirates completed Rogrim’s trials, then survived Buena Festa’s deadly Expo and explored a sunken civilization in the Echo Abyss. They reached the Sky Archipelago and helped Kumokakure Village repel corrupted cloud beasts, but the Dark Abyss had also corrupted the Cloud Roar Behemoth.

  • The Straw Hat Pirates trained across Rogrim’s trials, reached the summit of Unyielding Peak, and passed Gar Testa’s final challenge with Allen’s help.
  • The crew departed Rogrim for Delta Island, where Buena Festa’s Expo turned into a deadly ritual that Allen stopped by closing the rift to Nage Yurate.
  • The Straw Hat Pirates escaped Delta Island, then followed a distressing echo into the Echo Abyss and discovered a sunken ancient city.
  • Allen preserved the Memory Ark’s knowledge as the ancient device crumbled, and the crew sailed toward the Sky Archipelago.
  • The Thousand Sunny crossed the Storm Corridor and reached the White Sea, where the Straw Hat Pirates met the Winged Tribe at Kumokakure Village.
  • The Straw Hat Pirates fought corrupted cloud beasts, and Allen purified them before the Winged Tribe revealed that the Dark Abyss had corrupted the Cloud Roar Behemoth.
Chapters 376–400 Vol. 4 Read

Ch. 376The Gravity Stairway and the Start of Their Individual Trials

The Straw Hat Pirates began Rogrim’s trials, starting with the Gravity Stairway and then choosing training grounds suited to their abilities. Allen observed and guided them as their journey toward the summit of Unyielding Peak began.

  • Bal explained that gravity increased along the Gravity Stairway and could exceed ten times the outside world's gravity near the summit.
  • Zoro, Luffy, Ace, Jinbe, Franky, Sanji, Brook, Robin, and Allen tested the stairway, while Usopp and Chopper stayed near its base.
  • Bal described Rogrim’s other trials, including the Elemental Falls, Immense Weight Cavern, Illusion Corridor, and Combat Arena.
  • The Straw Hat Pirates split up to pursue individual training, with Usopp and Chopper setting up a safe camp to support them.
  • Allen moved between the trial grounds to offer guidance and reinforce his companions when their training put them in danger.

Ch. 377Breaking past the limits! Tempering in the furnace

The Straw Hat Pirates trained across Rogrim Island, with Allen guiding them as they developed their abilities under the island’s extreme conditions. As Zoro and Luffy made progress, the island generated new hazards, revealing that its trials were only beginning.

  • Zoro, Luffy, Ace, Sanji, and Brook endured specialized trials, while Usopp, Chopper, Franky, Jinbe, and Robin pursued their own training and research.
  • Allen helped the Straw Hat Pirates overcome training bottlenecks with targeted advice.
  • Rogrim Island adjusted its trials to match the pirates’ progress and began generating challenges.
  • As Zoro advanced toward the sixfold-gravity region, two rock puppets appeared and attacked him with giant swords.
  • After Luffy shattered his tenth rock wall, the cavern’s gravity doubled, the ground split open, and magma began pouring out.

Ch. 378Severing Gravity! Zoro's New Slashing Wave

Zoro defeated two gravity puppets after using a new slash to sever part of gravity’s influence on him. As the Straw Hat Pirates’ fighters completed their breakthroughs at Rogrim, they prepared to assault the summit of Unyielding Peak.

  • Zoro used Gravity Slash: One Line to weaken gravity’s hold on himself and make the puppets falter.
  • Zoro followed with Asura: Piercing Might and destroyed both gravity puppets.
  • Zoro realized he had begun to sever intangible forces and looked toward the summit of Unyielding Peak.
  • Luffy, Ace, and Sanji each demonstrated breakthroughs in their training at Rogrim.
  • The Straw Hat Pirates’ main fighters prepared to attack the final summit of Unyielding Peak.

Ch. 379The unyielding ascent to the summit-the final trial begins

After days of training, the Straw Hat Pirates climbed the Gravity Stairway again and overcame its strongest trials to reach the summit of Unyielding Peak. There, peak guardian Gar Testa announced that the final trial was beginning.

  • The Straw Hat Pirates regrouped at the foot of the Gravity Stairway, strengthened by their training and ready to try again.
  • Zoro, Luffy, Ace, Sanji, Jinbe, Franky, Brook, Robin, Usopp, and Chopper used their abilities and teamwork to push through the sixfold, sevenfold, and eightfold gravity zones and the island’s other trials.
  • The Straw Hat Pirates broke through the ninefold gravity zone and reached the summit of Unyielding Peak, with Allen following behind them.
  • Gar Testa introduced himself as Rogrim’s peak guardian, the “Unyielding Blade,” and declared that the final trial had begun.

Ch. 380Unyielding Blade-the pinnacle of Haki

Gar Testa overwhelmed the Straw Hat Pirates during the final trial, defeating their attacks without moving. After Allen identified the nature of Gar Testa’s presence, the peak master acknowledged him as the one qualified to face the trial, and the showdown between them began.

  • Gar Testa challenged the Straw Hat Pirates to endure one incense stick’s time against him or make him step back.
  • Zoro and Luffy attacked, but Gar Testa’s presence nullified their assaults and he criticized their cutting and Haki.
  • Ace’s flame spear vanished at Gar Testa’s fingertip, and the rest of the crew’s attacks also failed to move him.
  • Allen explained that Gar Testa’s presence was a power formed from concentrated will and understanding that negated lesser attacks.
  • Gar Testa recognized Allen’s insight, intensified his presence, and invited him to show how far his own presence had developed.

Ch. 381A Clash of Wills-The Torch Dragon's Might

Allen faced Gar Testa in the final trial, countering the summit master’s Unyielding Might with the power of Zhulong over light and spacetime. After Allen forced Gar Testa to retreat, Gar Testa declared that he had passed.

  • Gar Testa unleashed his Unyielding Might as an invisible blade aimed at Allen’s mind, will, and existence.
  • Allen raised his hand and used Zhulong’s power over light and spacetime to slow and dissolve the attack.
  • Allen pushed forward, dismantling Gar Testa’s Unyielding Domain and forcing him to take a step back.
  • Gar Testa accepted the result, recognized Allen’s higher level of power, and declared that he had passed the final trial.

Ch. 382The true meaning of the trial and the seeds of Haki

Gar Testa explained that Rogrim’s trial was meant to help the crew sense Haki and recognize their limits, then gave several Straw Hat Pirates golden drops to guide their training. After leaving Rogrim, the Thousand Sunny set sail toward the next destination.

  • Gar Testa told the Straw Hat Pirates that Rogrim’s trial was designed to reveal their limits and help them sense Haki, while Allen had already advanced beyond its lessons.
  • Gar Testa said he did not know the One Piece’s location but believed it held truths about the world and beyond.
  • Gar Testa gave Luffy, Zoro, Ace, Sanji, and Jinbe golden drops formed from his will and Haki to guide their development.
  • The crew left Gar Testa and descended from the summit, feeling stronger and more prepared.
  • The Thousand Sunny departed Rogrim as the Log Pose pointed toward a new destination.

Ch. 383An Invitation to the Expo

The Straw Hat Pirates received an invitation to Buena Festa’s New World Totto Land Exposition on Delta Island and decided to attend. Allen sensed that the event concealed danger as the Thousand Sunny set course for the island.

  • A mechanical hummingbird drone arrived at the Thousand Sunny and projected an invitation to the Expo on Delta Island.
  • The virtual host described the Expo’s attractions, including food, technology, performances, arena battles, cash prizes, and legendary treasures.
  • Nami retrieved the electronic invitation and an Eternal Log Pose pointing to Delta Island.
  • Luffy and the crew agreed to attend, while Allen sensed unusual energy and warned that the Expo might bring trouble.
  • Nami set the Log Pose and steered the Thousand Sunny toward Delta Island.

Ch. 384Clamor and undercurrents

The Thousand Sunny reached Delta Island, Buena Festa’s enormous artificial city, where Allen sensed hidden threats in its barrier and among its visitors. After the crew received wristbands and rules, they split up to explore, leaving Allen to survey the island from above.

  • The Thousand Sunny sailed toward Delta Island and saw ships of many kinds converging on the artificial city.
  • Luffy, Usopp, Robin, Franky, and the others marveled at the island while Allen detected powerful presences and manipulative mechanisms in its energy barrier.
  • The crew docked, and island staff gave them wristbands and a rulebook restricting large-scale fights and reserving final interpretation for the organizers.
  • Luffy rushed off for cotton candy, while Sanji, Franky, Brook, and Zoro followed their own pursuits; Ace also went to explore.
  • Nami, Robin, Usopp, and Chopper stayed together, Jinbe watched the harbor, and Allen vanished to a high-rise to survey Delta Island.

Ch. 385Dreams and Traps

The Straw Hat Pirates explored Delta Island as Allen sensed that the Expo was amplifying visitors’ desires and secretly drawing energy underground. Buena Festa announced a series of contests, including an unlimited arena tournament, and Luffy decided to enter as the island’s crowds rushed to compete.

  • Luffy and Zoro were drawn to the Multitude Arena, while Sanji headed for the mermaid performance and Brook entered a concert hall.
  • Nami, Robin, Usopp, and Chopper investigated the island’s attractions, and Nami learned that the arena offered a huge prize pool and a request from the organizers.
  • Franky explored the technology exhibits, Jinbe watched the ships in the harbor, and Ace sensed numerous powerful fighters across the island.
  • Allen detected that Delta Island was subtly amplifying people’s desires and channeling energy toward a hidden underground point.
  • Buena Festa announced contests across the Expo and promised the arena winner a personal request and information about the legendary treasure.
  • Luffy decided to enter the unlimited challenge tournament as visitors surged toward the competition areas.

Ch. 386Multitude Arena-A Vortex of Frenzy

Luffy and Zoro entered the Multitude Arena, where fighters battled for prizes as the crowd’s fighting desire and vital essence were secretly harvested by Buena Festa. After Luffy stepped onto the platform, Festa released three Demon Puppets to attack him.

  • Luffy and Zoro watched Boulder Tansen kill Zed with a shock wave and a crushing blow.
  • Bone-Crushing Hand Wu defeated Tansen by precisely breaking his joints, then stepped down after a Sky Island priest beat him.
  • Buena Festa and Dr. Indigo monitored the arena’s energy collection and identified Luffy, Zoro, and Wu as valuable sources.
  • Luffy leaped onto the platform and declared he would become the Pirate King.
  • Buena Festa opened three gates and sent the Demon Puppets onto the platform to face Luffy.

Ch. 387Devil Puppets-A Rampage of Madness

Luffy and Zoro destroyed three devil puppets in the tournament ring, but black-and-red energy emerged from their wreckage and attacked them. Festa identified it as activated Devil Factor, leaving the two braced for its assault.

  • The three devil puppets attacked Luffy with blades and mental interference, while Dr. Indigo recorded their combat data for Festa.
  • Luffy crushed one puppet with Gum-Gum-Elephant Gun, and Zoro intervened to deflect the remaining puppets' attacks.
  • Luffy and Zoro teamed up, then each destroyed one of the remaining puppets with powerful attacks.
  • Black-and-red energy rose from the wreckage and lunged at Luffy and Zoro as Zoro drew his swords and Luffy gathered his Conqueror's Haki.
  • Festa declared that the energy was activated Devil Factor and urged it to devour them.

Ch. 388Purification and a Shocking Turn-Allen Makes His Move

Allen purified the Devil Factor energy and exposed Festa’s scheme to devour the contestants’ wills and vital essence. Festa launched his contingency plan, unleashing devil puppets across Delta Island and targeting Allen, Luffy, and Zoro with the Eye of the Expo.

  • Allen used the Power of Zhulong to purify the Devil Factor energy attacking Luffy and Zoro.
  • Allen accused Buena Festa of using contaminated Devil Factors to consume contestants’ wills and vital essence.
  • Festa ordered the Final Feast to begin, releasing devil puppets and activating the Eye of the Expo.
  • The devil puppets attacked people across Delta Island as the island’s shield turned dark red.
  • The Eye of the Expo descended over the arena and began charging a destructive beam at Allen, Luffy, and Zoro.

Ch. 389All-out war

Allen and the Straw Hat Pirates fought to protect civilians as Festa turned Delta Island into a deadly altar. After opening an escape route and discovering the ritual’s energy source beneath the island, Allen teleported to the core control room to stop it.

  • Allen slowed the Eye of the Expo’s destructive beam with his power over time and space, opened a rift through the arena barrier, and directed the spectators to escape.
  • Luffy and Zoro protected the arena’s civilians while the other Straw Hat Pirates fought demon puppets and helped people across the island.
  • Festa activated hidden defenses and announced that the ritual to awaken the God of Carnival had begun.
  • Allen sensed an energy core beneath Delta Island gathering life essence, battle energy, fear, and despair, then told the others to hold on while he dealt with the source.
  • Allen vanished from the arena and appeared beneath the island, outside the core control room.

Ch. 390Battle at the Core-The True Face of the God of Revelry

Allen confronted Buena Festa and Dr. Indigo in Delta Island’s control room, where Festa’s ritual was summoning the extradimensional monster Nage Yurate. Allen closed the rift and ended the core crisis, then turned his attention to the battle still underway on the surface.

  • Allen entered the control room and discovered that the island’s energy was feeding a ritual and a spatial rift.
  • Buena Festa revealed that he intended to sacrifice the island’s people to summon Nage Yurate, then used his life to intensify the ritual.
  • Allen used the Power of Zhulong to repel Nage Yurate’s chaotic tentacles and resist its mental corruption.
  • Allen invoked Definition to close the spatial rift and force Nage Yurate back into its dimension.
  • The altar crumbled, Festa aged into dry bones, and Dr. Indigo collapsed in a mentally shattered state.
  • Allen turned toward the surface, where his companions were still fighting.

Ch. 391Embers and Rebirth-Delta Island's Finale

After Allen stopped the source of Delta Island’s catastrophe, the Straw Hat Pirates helped evacuate the survivors and left the ruined island. They sailed toward their next adventure, while Allen and Robin warned that the Devil Factor and Nage Yurate might point to further threats.

  • With the spatial rift closed and altar destroyed, the demonic puppets and island defenses stopped, and the barrier dissipated.
  • Allen warned Nami and Robin that the energy core was unstable, so the Straw Hat Pirates helped evacuate the survivors to the harbor.
  • After the last survivors departed, the Straw Hat Pirates returned to the Thousand Sunny and surveyed Delta Island’s ruins.
  • Allen and Robin discussed the unknown forces and technology behind the Devil Factor and Nage Yurate.
  • The Thousand Sunny sailed away, and Ace cheered Luffy up by suggesting they find a real party on their next adventure.

Ch. 392Sailing toward the Echo Abyss

The Straw Hat Pirates discovered that the Log Pose was reacting to a vast underwater structure in the Echo Abyss, where Allen sensed traces of a lost civilization and a faint distress signal. Luffy chose to investigate, and the Thousand Sunny headed toward the abyss as the crew prepared for a deep-sea adventure.

  • Nami noticed the Log Pose needle circling, and Allen sensed several energy sources coming from one enormous underwater structure.
  • Nami identified the waters ahead as the Echo Abyss, a dangerous, poorly charted region known for strange sounds from beneath the sea.
  • Allen sensed echoes containing traces of history and a faint distress signal, sparking Robin's interest in the lost civilization.
  • Luffy decided the crew would explore the abyss, and Franky checked the Sunny's diving system while Jinbe prepared to guide them.
  • The Thousand Sunny changed course and sailed toward the Echo Abyss.

Ch. 393Diving into the Abyss

The Thousand Sunny descended into the deep sea to investigate the source of the echo, which Allen recognized as fragments of memories and obsessions. The crew found a vast sunken city, but as they approached its central pyramid, a hostile guardian attacked them.

  • Nami confirmed that the crew had reached the area where the Log Pose wavered, and Franky transformed the Thousand Sunny for diving.
  • Jinbe guided the crew as the ship descended, while the echo intensified and unsettled several crewmates.
  • Allen sensed that the echo came from shattered memories attached to a huge object and spotted an artificial structure in the darkness.
  • The crew discovered an immense ancient city on the seabed, and Robin and Franky marveled at its architecture and technology.
  • As the Thousand Sunny approached the central pyramid, crimson lights appeared and spined tentacles reached for the ship while a brutal, hungry will struck the crew's minds.

Ch. 394Abyss Behemoth: Guardian or Invader?

The Abyss Behemoth attacked the Thousand Sunny, but Allen used his power to dispel the corruption affecting it and make it retreat. With the deep sea calmer, the crew prepared to explore the source of the echo in the sunken city's pyramid.

  • The Abyss Behemoth surrounded the Thousand Sunny, and the crew struggled to fight it underwater.
  • Jinbe identified the behemoth as the overlord of the Abyss, while Luffy's attack only dented its tentacle.
  • Allen left the ship's protective barrier and slowed the behemoth's attacks with a domain of stillness.
  • Allen acted on the creature's chaotic core consciousness, dispelling some of its corruption and prompting it to retreat.
  • Allen returned to the Thousand Sunny and said the crew could now explore the pyramid at the center of the sunken city.

Ch. 395The Ark of Memories

The Straw Hats discovered that the pyramid held a memory device preserving the history and emotions of the destroyed civilization, including its annihilation by green-flamed meteors and an evil eye symbol. As the device began to overload, Allen used the Power of Zhulong to try to save it.

  • The Thousand Sunny entered the pyramid and found a vast hall centered on a sphere that projected memories of the city's past.
  • Robin recognized the sphere as a device recording the civilization, while Allen sensed that its memories and negative emotions had formed the damaging echoes.
  • The device projected the civilization's destruction by meteors, revealing that its leaders had tried to preserve their people and showing an evil eye symbol in the sky.
  • Robin connected the symbol to an ancient civilization that worshipped destruction as the device's core began to glow red and approach collapse.
  • Allen touched the trembling device and used the Power of Zhulong to envelop it, hoping to prevent its history from vanishing.

Ch. 396History's imprint-A requiem for civilization

Allen preserved the civilization’s historical information from the collapsing Memory Ark while letting its painful memories rest. The Straw Hat Pirates left the sunken city with a sealed historical legacy and resumed their voyage toward the next destination.

  • Allen used the powers of time and existence to sort the Memory Ark’s memories and transfer valuable information into a temporary spacetime archive.
  • The civilization’s collective consciousness stopped resisting and helped pass on its knowledge before the Memory Ark crumbled away.
  • Usopp asked if it was over, Robin sensed fragments of information remained, Franky called it a goodbye, and Luffy wondered if the civilization had gone somewhere without meteorites.
  • Allen told Robin that the historical information was sealed in a spacetime node and might be deciphered with a key or deeper abilities.
  • The Straw Hat Pirates sailed out of the pyramid, surfaced into sunlight, and watched the Log Pose point toward their next destination.

Ch. 397An Azure Invitation-Toward the Sky Archipelago

Nami discovered that the Log Pose pointed toward the Sky Archipelago, a region of multiple islands floating in the sky. The Straw Hats prepared to sail there, eager for a new adventure despite the dangers Nami described.

  • Nami checked the Log Pose and chart and announced that the crew was heading toward the Sky Archipelago.
  • Robin explained that the Sky Archipelago contained multiple floating islands with distinct ecosystems and civilizations.
  • Nami warned the crew about dangerous air currents, thunderstorms, cloud-dwelling beasts, and the unknown attitudes of sky inhabitants.
  • Luffy urged the crew to set out for the Sky Archipelago, and the Thousand Sunny sailed toward it under Nami's and Jinbe's guidance.

Ch. 398Road to the Sky-Storms and Wonders

The Thousand Sunny entered a hidden wind channel in a massive storm and rode it up to the White Sea. The crew explored the cloud sea as the Log Pose pointed toward a higher, more mysterious region.

  • Nami warned the crew that they were approaching the Storm Corridor, while Jinbe sensed powerful currents beneath the waves.
  • Allen detected a maintained wind channel through the storm, and Nami guided Jinbe toward it.
  • The Thousand Sunny climbed through the storm along the wind channel and emerged onto the White Sea.
  • The crew marveled at the cloud sea and spotted strange creatures and enormous winged shadows nearby.
  • The Log Pose activated again and tilted upward toward the depths of the White-White Sea.

Ch. 399Kumokakure Village-The Winged Tribe's Invitation and Wariness

The Straw Hat Pirates reached Kumokakure Village, a settlement of the Winged Tribe in the White Sea, and were cautiously questioned about their purpose. When corrupted cloud beasts attacked the village, Luffy agreed to help, drawing the crew into the crisis.

  • The Thousand Sunny approached Kumokakure Village as cloud creatures danced to Brook’s piano music.
  • Robin identified the flying villagers as the Winged Tribe, and their leader questioned the Straw Hat Pirates about their intentions.
  • Nami explained that the crew had followed their Log Pose and only wanted to explore and resupply.
  • Bells sounded as corrupted cloud beasts attacked the village and its sacred grounds.
  • The Winged Tribe leader asked the crew for help, and Luffy agreed to fight the beasts.

Ch. 400Cloud Beast Rampage-Corruption and Purification

The Straw Hat Pirates helped the winged warriors fight corrupted cloud beasts attacking Kumokakure Village, while Allen purified the beasts with his power. The village then faced a greater threat when the Cloud Roar Behemoth at the sacred ground was revealed to be corrupted by the Dark Abyss.

  • The Straw Hat Pirates joined the winged warriors in fighting cloud beasts corrupted by dark-purple energy.
  • The crew drove back the beasts, but the fallen creatures released corrupting energy that threatened to spread through the village.
  • Robin identified purification as the way to stop the beasts from recovering and contaminating others.
  • Allen scattered points of purifying light across the battlefield, restoring the cloud beasts' senses and halting their attacks.
  • The lead winged warrior thanked Allen and identified the corrupting force as the Dark Abyss.
  • A powerful Dark Abyss aura erupted from the sacred ground, and the winged warrior revealed that the Cloud Roar Behemoth had been corrupted.
Arc 16 of 21
Arc 16 of 21