Chapter 421 opens with the title page, "GEAR THIRD." The cover illustration shows Nico Robin in a quiet billiards-room scene with small animal attendants and a scoreboard marked with keys. The image is playful and separate from the Enies Lobby battle, but it is useful as chapter-identifying material and visually echoes the chapter's recent focus on Robin's unlocked handcuffs.
Nico Robin
01
The Buster Call begins in full. From the warships, the order is given: "TRIGGERING THE BUSTER CALL!!!" The target is stated with brutal official clarity: "TARGETING THE PIRATE STRAWHAT LUFFY AND HIS GANG, APPROXIMATE COUNT: 60." The order adds one exception: "HOWEVER, UNDER THE PRIVATE AGREEMENT WITH ADMIRAL AOKIJI, THE CRIMINAL NICO ROBIN, WHO IS ON THE BRIDGE OF HESITATION, WILL BE EXCLUDED FROM THE TARGETS!!" Everything else is expendable: "OTHER DETAILS ARE UNIMPORTANT!! DESTROY THE ENTIRE JUDICIAL ISLAND, ENIES LOBBY!!!" Cannon fire rains over the island, smashing buildings and sending everyone into panic. On the ground, people cry, "TH-THEY'VE COME!!!" "THE BOMBARDMENT HAS BEGUN!!" and "UWAA-AAH!!!" The forces below already know the only answer: "WE KNOW THAT!!! TRY TO ESCAPE!!"
Monkey D. LuffyNico RobinKuzan
02
The Marines and allies scatter under the bombardment. Someone shouts, "ALL SHIPS, TAKE POSITIONS!!" while panic spreads across the bridge: "THOSE WARSHIPS WILL BYPASS THIS BRIDGE!!" and "THERE, LOOK, GUYS!! DON'T RUN!!" The reason is soon announced: "THE BRIDGE THE CRIMINAL NICO ROBIN IS ON WILL BE TEMPORARILY EXCLUDED FROM THE TARGETS!!" Spandam's pride turns that exception into self-praise. "WAHAHA, IT'S ALL BECAUSE I'M HERE!! RIGHT, MY DAD SAID SO, TOO!!" he laughs, and another voice admits, "IT'S ALL BECAUSE I'M THE CHIEF OF CP9!!" The others can only stare at the devastation. "... WHAT A HORRIBLE SCENE," someone says. Robin trembles and whispers, "I CAN'T STOP TREMBLING...!!" while Franky, wounded but still standing beside her, mutters through his breath, "HRM? HEY... YOU...!!"
Nico RobinFrankySpandam
03
Sogeking tumbles through smoke and rubble, yelling, "HURRY, GUYS!!!" and "MOVE IT!!!" The others grab him and drag him along, but he protests in heroic outrage: "DON'T SQUAWK LIKE YOU'RE ALL GREAT AND WHATNOT!!" He boasts even as he is carried, "I'VE GOT INJURIES ALL OVER MY BODY. ALL MY RIBS ARE BROKEN!!" and insists, "ALL SIX OF THEM." Sanji dryly answers that it is fine: "IT'S OKAY. YOU HAVE MORE THAN THAT... YOU'RE GIVING US TOO MUCH TROUBLE." Sogeking keeps shouting about his new weapon, "... BY THE WAY, GUYS! DO YOU WANT TO KNOW THE SECRET OF MY NEW WEAPON, KABUTO!?" and "LET ME EXPLAIN!! THE WEAPON 'KABUTO' THAT SOGEKING HAS IS...!!" Sanji cuts through the noise: "JUST SHUT UP, BASTARD, OR I'LL MAKE YOU RUN!!" Behind them, Zoro is still wounded and Sanji has to push the whole group forward while the tower area collapses.
SogekingSanjiRoronoa Zoro
04
The scene shifts to the underground passage below the sea. A small map shows Nami, Chopper, Kokoro, Gonbe, and Chimney on one side, while Zoro, Sogeking, and Sanji are on the other, all trying to reach one another through the shortcut. Suddenly water floods the corridor. Nami cries, "WHY WATER!!? WHA!!? WHY!!? THERE IS NO ESCAPE HATCH OR ANYTHING!!" Chopper panics, "WATER~~~!!?" and Kokoro, still carrying the others forward, yells, "WHAD IN DAH NAME O' BEER IS THIZZ?" The surge barrels through the passage with everyone running from it, and someone screams, "HEEEELP!!!" The flooding is not random. It is the result of Lucci's attack from the previous chapter, and the escape route is turning into a trap.
NamiTony Tony ChopperKokoroChimneyGonbe
05
Inside the Bridge of Hesitation prop interior, the water keeps rising. The map identifies the arena as "Luffy vs Rob Lucci," and Lucci looks down at the flood he has caused. He tells Luffy, "WHETHER OR NOT THERE IS ANYONE IN THE PASSAGE, THE PATH TO THIS PLACE HAS BEEN CUT OFF..." Then he makes the threat plain: "IT IS ONLY A MATTER OF TIME UNTIL THIS ROOM IS COMPLETELY FILLED WITH WATER." Luffy screams back, "BASTARD!!!" because he now understands that his friends may be trapped below. Lucci has turned the building itself into a weapon, using seawater to shut off escape and punish anyone trying to reach the bridge.
Monkey D. LuffyRob Lucci
06
Luffy looks up as the ceiling and circular upper structure crack under the force of the battle and the bombardment. A Den Den Mushi connection clicks and coos, and Lucci points out that the room is still above sea level: "THIS PLACE IS LOCATED ABOVE SEA LEVEL, SO THE WATER WON'T REACH HERE." He also makes Luffy listen to what is happening outside: "YOU CAN HEAR THE SOUND OF THE WARSHIPS' BOMBARDMENT, CAN'T YOU?" Luffy stands across from him, battered and breathing hard, thinking of the others. The questions hang over him: "WHAT HAPPENED TO THE PIRATES...?" and "WHAT HAPPENED TO NICO ROBIN...?" Lucci uses every sound from outside as pressure, trying to make Luffy feel the battlefield collapsing beyond his reach.
Monkey D. LuffyRob LucciNico Robin
07
Lucci tells Luffy, "YOU MUST BE WORRIED TO DEATH ABOUT THEM." He offers the bait directly: "IF YOU WANT TO SAVE THEM, GO AHEAD AND DO SO..." But Luffy refuses to turn away. "... I WILL NOT TAKE MY EYES OFF OF YOU," he says. Then he explains the decision with full certainty: "NO MATTER WHAT THEY ARE GOING THROUGH NOW, THEY WILL SURELY SURVIVE!!! BUT IF I LET YOU GET AWAY HERE... YOU WILL GO KILL MY NAKAMA...!!! I WILL NOT TAKE MY EYES OFF OF YOU!!!" Lucci only laughs, "FUFU...!" while, outside, Sanji snaps at Sogeking, "THE BOMBARDMENT HAS ALREADY BEGUN. BY THE WAY, GUYS... YOU, SHUT UP!!" Sogeking answers with a desperate "NO~~~!!" Luffy's faith in his crew becomes the reason he stays with the most dangerous enemy.
Monkey D. LuffyRob LucciSanjiSogeking
08
Lucci acknowledges Luffy's words with cold amusement. "YOU'RE REALLY CUT OUT TO BE THE BOSS. I WANT A CERTAIN IDIOT TO HEAR THAT." Then he asks the real question: "BUT WILL YOUR ABILITIES MEET THAT RESOLUTION?" Lucci attacks, warning that the same thing would happen "IF YOU DIED, TOO!!" He drives in with "SHIGAN!!!" and follows with "RANKYAKU," cutting and striking as Luffy struggles to stay on his feet. Luffy is hit hard enough to cry out, "UGH!!" but the challenge is clear: his resolve is unquestionable, yet Lucci is testing whether his body can actually carry it.
Monkey D. LuffyRob Lucci
09
Lucci's leopard tail lashes out with "HYOUBI!!!" and sweeps across the ruined floor. Luffy is knocked and battered through the exchange, but he keeps closing the distance. Lucci asks him directly, "CAN YOU DEFEAT ME?" The question lands between them like a verdict. Luffy's answer is not a speech yet; it is the way he gets back in range after every hit. He is bruised, breathing hard, and still standing in front of the enemy who could kill his friends if he escapes.
Monkey D. LuffyRob Lucci
10
Luffy finally says the rule that has been driving him: "IF I CANNOT DEFEAT YOU, I WON'T BE ABLE TO PROTECT ANYBODY!!" He launches himself forward with a spinning arm, calling, "GOMU GOMU" as the rubber coils stretch toward Lucci. The attack becomes "RIFLE!!!" but Lucci hardens his body with "TEKKAI" and takes the blow without falling. The failed impact shows Luffy that normal force is not enough. If he wants to stop Lucci before the flood and Buster Call consume everyone, he needs something beyond the attacks he has already shown.
Monkey D. LuffyRob Lucci
11
Lucci counters immediately with "UTSUGI!!!" and turns Luffy's own force back against him. He explains the technique: "IT'S A COUNTER-ATTACK USING 'TEKKAI.' IF IT WERE AN ORDINARY PERSON'S FIST, IT COULD BREAK INTO PIECES." Then he admits Luffy is tougher than expected: "I THOUGHT I MET SOMEONE WITH GUTS, BUT I GUESS I WAS WRONG... AFTER ALL, THE EFFECTS OF THE EARLIER DOPING ARE NOW GONE." Lucci continues with a ranged strike, "FLYING 'SHIGAN' 'BACHI'!!!" Luffy pants under the damage, and Lucci's words make clear that Gear Second's boost has faded. The fight is entering the moment where Luffy must reveal another answer or lose.
Monkey D. LuffyRob Lucci
12
Lucci keeps driving Luffy backward. A heavy strike sends him flying with "UGH!!" and another shot tears through the space around him. Lucci calls "RANKYAKU," and Luffy barely reacts in time, shouting "SHIT!!" before the slash rips past. He is knocked again with "UWAH!!" and skids through the ruined room. The page is a chain of impacts, but the important story beat is that Lucci now has momentum: Luffy is injured, Gear Second's speed has faded, and the room is still becoming more dangerous by the minute.
Monkey D. LuffyRob Lucci
13
Luffy is hit by a "STAMP!!!" and drops back, panting. Then he stands again and changes the battle. "HAA... HAA... IF YOU WANT TO HAVE A BATTLE OF FORTITUDES," he says, "LET ME SHOW YOU... MY OTHER TECHNIQUE!!!" Lucci pauses, alert. Luffy grips his thumb between his teeth and speaks the word that gives the chapter its title: "GEAR" and then "THIRD." The quiet before the technique is almost heavier than the fight itself, because Luffy is choosing a power Lucci has not seen and one that clearly costs him something to use.
Monkey D. LuffyRob Lucci
14
Luffy bites into his thumb and forces air into his body. "HAAAAA..." he breathes, then releases the technique: "HONE FUU-SEN!!!" The note of the move becomes visible as his arm swells grotesquely, a "BONE BALLOON" filled by the air moving "FROM BONE TO BONE." Lucci stares and repeats the idea in disbelief: "BONE...!?" Luffy displays the result with wild confidence: "BEHOLD!! THIS LEFT ARM IS..." His body remains small beneath the absurdly massive limb, and the page makes the new technique feel both comical and terrifying.
Monkey D. LuffyRob Lucci
15
The enlarged fist looms in front of Lucci. Luffy names it with pride: "THE ARM OF THE GIANTS!!!" Lucci tries to dismiss it, saying, "IF IT'S JUST ALL LOOKS, DON'T EVEN BOTHER...!!" and prepares "TEKKAI!" Luffy begins the attack again: "GOMU GOMU..." His giant arm draws back with the mass of a weapon far beyond his usual rubber punches. Lucci hardens himself, confident that a defensive technique that stopped Rifle can stop this too, but the scale of the fist suggests the battle has changed completely.
Monkey D. LuffyRob Lucci
16
Luffy's new attack lands with monstrous force: "GIGANT PISTOL!!!" The swollen fist smashes Lucci through the wall and into the outer tower structure, blasting stone apart and throwing debris across the sea-facing side of the building. Lucci's shock is visible in the narrow panel as the impact carries him away. The blow is so large that it looks less like a punch and more like a siege weapon fired from Luffy's body. Gear Third has finally answered Lucci's question about whether Luffy's abilities can match his resolve.
Monkey D. LuffyRob Lucci
17
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End of chapter18 pages
Discussion
One Piece Chapter 421: Gear Third
p6
Warship bombardment is audible from the location.
p7Luffy refuses to look away from Rob Lucci during the confrontation.
p7Bombardment of the area has started.
p7Sanji is present with the group on the ground level.
p8Leopard-spotted fighter follows with close-range Shigan finger strikes.
p8Luffy receives multiple impacts and grunts in pain.
p9Leopard-spotted fighter uses tail strike to launch Luffy.
p9Luffy crashes through debris after tail impact.
p9Leopard-spotted fighter continues assault while Luffy is sent flying again.
p10Luffy prepares Gomu Gomu Rifle while stating protective resolve.
p10Leopard-spotted fighter counters with Tekkai defense.
p11Luffy's punch breaks through Tekkai defense.
p11Leopard-spotted fighter comments that earlier doping effects are gone.
p11Fight continues in heavily damaged arena setting.
p12Luffy receives a powerful kick that sends him flying.
p12Leopard-patterned fighter uses Rankyaku technique in the exchange.
p13Luffy performs a spinning Stamp attack.
p13Luffy activates Gear Third during the fight.
p14Luffy inflates his left arm using air pressure between bones.
p14Luffy names the technique Hone Fuli-sen.
p15Luffy attacks with giant-sized arm called the Arm of the Giants.
p15Leopard-patterned fighter uses Tekkai to defend.
p16Luffy performs Gigant Pistol technique against a massive stone sea fortress.
p16The fortress partially collapses from the impact with debris and scaffolding flying outward.
p16Large waves surround the base of the tower during the attack.
What is said, page by page
p1Narration states Robin on Bridge of Hesitation is excluded from targets under Aokiji agreement but Buster Call targets Strawhat crew.
p1Civilians shout that bombardment has begun and urge escape from ruin.
p2Character claims indiscriminate bombardment will avoid him due to personal status.
p2CP9 chief declares the bridge is safe because Robin is present.
p2Allies warn that warships are bypassing the bridge and urge others not to run.
p3Injured fighter states all ribs are broken and complains of excessive trouble.
p3Sogeking demands explanation about weapon Kabuto secret.
p3Fighter warns not to run and threatens further injury.
p4Top-hatted pirate shouts frantic panic about sudden water flooding and lack of any escape hatch, conveying terror and helplessness.
p4Rabbit-like pirate cries out repeated 'GNYAA!! GNYAA!!' in pure fear.
p4Background voice yells confusion about the water source in drunken-sounding panic.
p4Nami remains silent but visibly shocked amid the group chaos.
p5Rob Lucci states the path has been cut off and warns the room will soon fill completely with water, calm and analytical tone.
p5Luffy glares upward and shouts 'BAS-TARD!!!' in rage.
p6Rob Lucci notes that the sound of warship bombardment can be heard and states the location is above sea level so water will not reach, confident tone.
p6Distant voices question what happened to the pirates and to Nico Robin.
p7Luffy vows repeatedly that he will not take his eyes off Lucci no matter what happens to his nakama, fierce and resolute tone.
p7Lucci smirks and suggests Luffy should go save his friends if worried, mocking tone.
p7Luffy insists his nakama will survive and that letting Lucci escape would endanger them.
p7Lucci responds with short laugh 'FUFU...!'.
p7Sanji tells the group to shut up and notes that the bombardment has already begun.
p8Leopard-spotted fighter questions whether Luffy's abilities match his stated resolution, with serious and challenging tone.
p8Leopard-spotted fighter states he wants a certain idiot to hear his words and declares Luffy is suited to be boss, with mocking intent.
p8Leopard-spotted fighter shouts that the same outcome would occur if Luffy died, with aggressive warning mood.
p8Leopard-spotted fighter yells SHIGAN while executing rapid strikes, with intense combat focus.
p9Leopard-spotted fighter demands to know if Luffy can defeat him, with taunting and dominant tone.
p9Luffy stares upward with determined expression while recovering from impact.
p10Luffy declares that failing to defeat the opponent means he cannot protect anyone, with fierce and resolute mood.
p10Luffy calls out GOMU GOMU RIFLE during stretched punch attack.
p10Leopard-spotted fighter activates Tekkai to counter the incoming strike.
p11Leopard-spotted fighter explains Tekkai counter-attack would break an ordinary fist, with analytical tone.
p11Leopard-spotted fighter notes flying Shigan technique and observes doping effects have worn off, with surprised realization.
p11Leopard-spotted fighter admits he thought he met someone with real guts, with reflective mood.
p11Luffy pants heavily after impact while recovering stance.
p12Leopard-patterned fighter shouts BE PREPARED with aggressive intent while landing crushing blow.
p12Luffy cries UGH!! in pain as kick connects and launches him backward.
p12Leopard-patterned fighter yells ACK!!! during counter exchange.
p12Luffy calls out RANKYAKU. as technique name during defensive strike.
p12Luffy reacts with SHIT!! in panic as Rankyaku lands.
p12Luffy shouts UWAH!! while being hurled aside by impact.
p13Luffy breathes HAA... while preparing spinning strike.
p13Leopard-patterned fighter challenges LET ME SHOW YOU... MY OTHER TECHNIQUE...!! with determined tone.
p13Leopard-patterned fighter proposes battle of fortitudes while panting.
p13Luffy declares GEAR then THIRD. with intense expression.
p14Luffy yells HONE FULI-SEN!!! while using inflated arm technique.
p14Leopard-patterned fighter gasps BONE...!? and MOK!! in shock.
p14Luffy announces BEHOLD!! THIS LEFT ARM IS... during attack.
p15Luffy declares THE ARM OF THE GIANTS!!! while swinging giant limb.
p15Leopard-patterned fighter yells TEKKAI! while bracing for impact.
p15Leopard-patterned fighter dismisses attack as IF IT'S JUST ALL LOOKS, DON'T EVEN BOTHER...!!!
p16Luffy shouts attack name 'GIGANT PISTOL' with intense wide-eyed expression and open mouth, conveying aggressive intent during the strike.
p16Unseen observer reacts with surprise '!!?' in bottom left bubble, indicating shock at the scale of destruction.