Chapter Summaries

Izayoi died after a long life of grief for Tōga, leaving Inuyasha devastated. The King of the Underworld comforted Inuyasha, then encouraged Kōga to grow stronger by beating him in a training match.

• Chongli told the King of the Underworld that Izayoi had died, and he went to pay his respects.
• Inuyasha wept beside Izayoi’s body until the King of the Underworld urged him to accept that she had finally found peace with Tōga.
• The King of the Underworld took Kōga away, and Kōga asked him not to die because he feared losing another family member.
• The King of the Underworld promised Kōga that no one could threaten his life and told him to become stronger.
• The King of the Underworld tested Kōga’s strength at a training ground, leaving him bruised but more determined to protect the Wolf Tribe.

Inuyasha left Demon Wolf Castle to gain experience, and the King of the Underworld gave him Tessaiga, warning him never to let it leave his side. After ordering Kōga to venture out as well, the King of the Underworld turned his thoughts toward pursuing eternal life.

• Chongli reported that the White Tiger clan had remained hidden for more than forty years, while the Wolf Tribe had grown to rule the four demon countries.
• Inuyasha told the King of the Underworld that he was leaving to see the world and find his own path.
• The King of the Underworld gave Inuyasha Tessaiga, which he could not draw, and told him to keep it with him always.
• Inuyasha thanked the King of the Underworld and left Demon Wolf Castle to begin his journey.
• The King of the Underworld told Chongli to let Kōga leave and gain experience too.
• The King of the Underworld decided that he would seek eternal life and become the world's first immortal.

The King of the Underworld traveled toward Horai Immortal Island to investigate the Roaring Furnace and its connection to eternal life. On the way, he encountered Sesshomaru, who challenged him to reveal the difference between their strength.

• The King of the Underworld rode Entei toward Horai Immortal Island with Chongli and explained that he sought the Roaring Furnace and the Four War Gods.
• The King of the Underworld told Chongli that Horai Immortal Island was hidden by a barrier that weakened every fifty years.
• Sesshomaru arrived in the sky, and the King of the Underworld congratulated him on becoming a Great Yokai and manifesting Bakusaiga.
• Sesshomaru drew Bakusaiga and challenged the King of the Underworld, while Chongli and Entei withdrew from the coming battle.

Sesshomaru fought the King of the Underworld, who wielded Slay Gods and Demons against Sesshomaru’s innate blade, Bakusaiga. The King of the Underworld defeated him, and Sesshomaru left determined to grow stronger and win next time.

• The King of the Underworld recognized Bakusaiga and drew Slay Gods and Demons, prompting Sesshomaru to challenge him.
• Sesshomaru and the King of the Underworld clashed, shattering mountains and exchanging powerful attacks, including Diamond Spear Strike and Ice Dragon Blast.
• After their battle tore open space, the King of the Underworld demanded that Sesshomaru use his full strength.
• Sesshomaru unleashed Azure Dragon Shattering Blast, but the King of the Underworld’s Ice Dragon · Ninefold Break · Annihilation froze and defeated it.
• The King of the Underworld held his blade to Sesshomaru’s throat and declared victory, and Sesshomaru departed resolved to win next time.

Inuyasha left Demon Wolf Castle to seek a way to become a true demon, and Miroku caught up with him. Their journey ended in a brutal encounter with Sesshomaru, who easily defeated Inuyasha and left him collapsed as Miroku begged for mercy.

• Inuyasha killed a Human-Faced Centipede and told Miroku he had left Demon Wolf Castle to find his own path and become a true demon.
• Miroku refused to return and insisted on accompanying Inuyasha as his father had ordered.
• Inuyasha sensed Sesshomaru approaching, and Sesshomaru noticed Tessaiga at Inuyasha's waist and demanded that he draw it.
• Sesshomaru struck Inuyasha and evaded his Iron Reaver Soul Stealer and Blood Blade Claws with ease.
• Sesshomaru shattered Inuyasha's strongest attack and knocked him unconscious, while Miroku pleaded for him to spare Inuyasha.

Sesshomaru nearly killed Inuyasha, whose demon blood erupted until Tessaiga restored his control. Inuyasha vowed to defeat Sesshomaru, while the King of the Underworld and Chongli reached the misty sea near Horai Island and faced an attack from Genro.

• Sesshomaru choked Inuyasha and demanded that he draw Tessaiga, causing Inuyasha's great yokai bloodline to awaken and overwhelm him.
• Sesshomaru realized Tessaiga suppressed Inuyasha's demon blood and sent the sword into Inuyasha's hand, ending his transformation.
• Sesshomaru left after calling Inuyasha weak, and Inuyasha swore to defeat him.
• The King of the Underworld sensed Genro beneath the sea and led Chongli through the mist toward Horai Island.
• Genro fired demon power orbs at them, and Chongli deflected the attack with the Ruyi Jingu Bang before striking the sea and creating a vast whirlpool.

Chongli defeated Black Tortoise Genro after the King of the Underworld revealed that Genro’s core essence was sealed away and that he would revive. As the King of the Underworld explained, the other three War Gods arrived and recognized him.

• Chongli struck Genro with his iron rod, and the King of the Underworld identified Genro as a Black Tortoise missing his core essence.
• Genro apologized, then attacked Chongli with over a hundred orbs of demon power when Chongli struck again.
• Chongli shattered Genro’s shell, and Genro’s body vanished after he warned that his three elder brothers would avenge him.
• The King of the Underworld explained that Genro would revive once his sealed core essence was released, and Chongli wondered whether he could eat the other Black Tortoises.
• Azure Dragon Ryuura, White Tiger Shuura, and Vermilion Bird Kyora arrived, and Kyora recognized the King of the Underworld.

The King of the Underworld reached Horai Immortal Island while Chongli fought Ryura, Kyora, and Jura, then forced open the Roaring Furnace to investigate its flames. Deep inside, a mysterious woman’s voice asked who he was.

• Kyora recognized the King of the Underworld as the one who had killed him fifty years earlier and vowed revenge.
• The King of the Underworld sent Chongli to fight Ryura, Kyora, and Jura, then rode Entei toward Horai Immortal Island.
• The half-demon children feared the King of the Underworld was another demon seeking the Roaring Furnace’s power as he passed them and headed inland.
• The King of the Underworld forced open the Roaring Furnace and entered it with Entei, protected from its flames by his barrier.
• A brilliant light appeared deep inside the furnace, and a woman’s voice asked the King of the Underworld who he was.

The King of the Underworld met Sōki inside the crimson furnace, took the Jade Casket, and destroyed her spirit when she asked him to spare Horai Island’s villagers. He then sensed someone else hiding in the furnace and demanded that they reveal themselves.

• Sōki introduced herself as Horai Island’s guardian priestess and asked why the King of the Underworld had come.
• The King of the Underworld explained that the Four War Gods had led him to the island and demanded the Jade Casket.
• He said he intended to release the Four War Gods’ essences and eat them, and Sōki handed over the casket after asking him not to harm the villagers.
• When the King of the Underworld took offense at Sōki’s request, he extinguished her light and made her spirit disappear.
• The King of the Underworld unleashed his power throughout the furnace and called for the hidden observer to come out.

The King of the Underworld discovered Penglai Immortal inside the Refining Furnace and learned about the artifact’s powers and limitations. He decided to take the furnace and improve it for his clan, while Penglai Immortal challenged him to move it from Horai Island.

• The King of the Underworld sensed a hidden presence in the furnace and revealed Penglai Immortal, who praised his ability to detect him.
• Penglai Immortal explained that the Refining Furnace could refine anything containing spiritual power, but it needed a long time to recover after each use.
• The King of the Underworld identified the furnace’s inability to strengthen itself as its greatest flaw and considered having Hairinbō or yokai smiths improve it.
• The King of the Underworld asked Penglai Immortal to leave Horai Island, and Penglai Immortal agreed if he could move the hundred-thousand-jin furnace.

The King of the Underworld ordered Chongli to carry the Refining Furnace away from Horai Immortal Island, then released the Four War Gods’ source powers. When the restored Four War Gods attacked, the King of the Underworld froze them with a single slash and set out for Demon Wolf Castle with his spoils.

• Chongli arrived after defeating Ryuura, Kyora, and Shuura, then transformed into a giant ape and lifted the Refining Furnace.
• The King of the Underworld destroyed the seal on Sōki’s Jade Casket and released the Four War Gods’ source powers.
• The Four War Gods regained their fused form and reached the level of a great yokai, though their power remained weakened.
• The Four War Gods attacked the King of the Underworld, who froze them with One-Sword Style Iaijutsu: Four Realms Freeze.
• The King of the Underworld ordered Chongli to carry the frozen Four War Gods and the Refining Furnace back to Demon Wolf Castle.

Reverend Baixin protected Faming from a demon’s enchantment and resolved to confront the Wolf Tribe, which a dying diviner had identified as the force blocking humanity’s rise. He set out toward the Wolf Tribe to take the first step against it.

• Reverend Baixin exposed a seductive woman as a demon and destroyed her with a golden manifestation when she tried to ensnare Faming.
• Faming broke free of the demon’s charm, apologized to Reverend Baixin, and promised to study Buddhist teachings more diligently.
• Reverend Baixin recalled that a diviner had died after revealing the Wolf Tribe of the Western Country would destroy humanity’s fortunes.
• Reverend Baixin decided to be the first to act and strode toward the Wolf Tribe of the Western Country.

The King of the Underworld brought the Refining Furnace to Demon Wolf Castle and learned that it could refine anything into pure power, but its drawback required expert smiths to investigate. After a month studying the Penglai Immortal’s knowledge, he learned that no being had lived beyond twenty thousand years, yet he remained determined to find eternal life.

• Chongli showed the Five Demon Wolves the Refining Furnace and explained that the immortal artifact could refine anything in the world into pure power.
• The King of the Underworld arrived with Hairinbō, who examined the furnace and said he could not eliminate its drawback alone.
• The King of the Underworld ordered the Five Demon Wolves to summon Tōtōsai, the Evil Sword Smith, and other skilled smiths, and instructed Hairinbō to forge the Four War Gods’ bodies into a weapon.
• The King of the Underworld entered the Refining Furnace and spent a month questioning the Penglai Immortal about the world and eternal life.
• The King of the Underworld learned that no being had lived beyond twenty thousand years, but resolved to break that limit.

The King of the Underworld left Demon Wolf Castle to seek knowledge from Bokusenō, but Reverend Baixin intercepted him and declared he had come to kill him for humanity’s future. Baixin unleashed a month’s worth of gathered spiritual power, preparing to stake his life against the yokai king.

• The King of the Underworld ordered the smiths gathered at Demon Wolf Castle to help Hairinbō repair the Refining Furnace, then set out with Chongli and Entei to visit Bokusenō.
• Reverend Baixin appeared before the King of the Underworld and identified him as the Wolf Tribe’s leader.
• Chongli prepared to fight, but the King of the Underworld told him to stand down and questioned Reverend Baixin’s purpose.
• Reverend Baixin said he intended to subdue the King of the Underworld because his power threatened humanity’s future, despite his not having harmed humans.
• Reverend Baixin revealed that he had spent a month gathering power and began unleashing a blazing golden light to destroy the King of the Underworld.

The King of the Underworld fought Reverend Baixin, whose purifying power suppressed Chongli and Entei but could not overcome the king’s strength. The King of the Underworld killed Reverend Baixin with Four Realms Freeze, leaving the watching yokai celebrating their ruler’s victory.

• Reverend Baixin used the Demon-Subduing Pestle and his purifying light to attack the King of the Underworld, while Chongli and Entei struggled under the suppression.
• The King of the Underworld met Reverend Baixin’s attacks with Slay Gods and Demons and his other techniques, and their battle devastated the surrounding landscape.
• Watching yokai recognized Reverend Baixin as an experienced monk who had killed a Greater Yokai, but they remained confident in the King of the Underworld.
• Reverend Baixin exhausted more than half his power and launched a final attack with his Golden Body Dharma Form and Demon-Subduing Pestle.
• The King of the Underworld used Four Realms Freeze to kill Reverend Baixin, shattering his golden body and making the Demon-Subduing Pestle vanish.
• The yokai celebrated as the King of the Underworld stood victorious without a scratch.

After Reverend Baixin died fighting the King of the Underworld, Miko Qinglian attacked him but was killed, and Faming was slain while trying to escape. The King of the Underworld ordered Chongli to return to Demon Wolf Castle, intent on retaliating against humanity.

• Faming grieved for Reverend Baixin, and an old woman healed him and urged him to survive and avenge his master.
• Miko Qinglian introduced herself and attacked the King of the Underworld with a Demon-Breaking arrow and three Evil-Slaying arrows.
• The King of the Underworld destroyed Qinglian's arrows and killed her with a swift sword strike.
• Faming tried to flee, but Chongli blocked him and killed him with a blow from his rod.
• The King of the Underworld ordered Chongli to return to Demon Wolf Castle, deciding to act against the humans who had provoked him.

The King of the Underworld’s clash with human experts brought the Demon World and human realm to the brink of war, as yokai gathered and human forces assembled under Blood Eyes. Sesshomaru headed for the Wolf Tribe to prevent anyone but himself from defeating the King of the Underworld.

• Yokai discussed the King of the Underworld’s anger and began moving toward the Wolf Tribe, eager to fight humans.
• Human experts worried that Reverend Baixin and Miko Qinglian had provoked the yokai, but Blood Eyes declared that the King of the Underworld would die and ordered humanity’s forces to unite.
• Monks, yokai slayers, shrine maidens, and generals gathered as war between humans and yokai became imminent.
• A human army attacked Sesshomaru and Jaken, and Sesshomaru killed every soldier with a single slash of Bakusaiga.
• After Jaken complained about the humans and their plan against the King of the Underworld, Sesshomaru set out for the Wolf Tribe, determined that only he could defeat the king.

As war between humans and yokai loomed, Inuyasha and Kōga chose to join the fighting, while several factions saw the conflict as a chance to advance their own aims. Shinigami Oni emerged from hiding and set out to join the war and seek revenge on Sesshomaru.

• Inuyasha and Kōga agreed to fight the humans, then parted ways as Inuyasha left to find stronger opponents.
• Guigu persuaded the Snow Emperor to use the humans to destroy the King of the Underworld in the name of universal love.
• Manten awakened in the Forest of Desolation and began drawing power from his father Flying Moth's heart to restore the Moth Demon Tribe.
• The Leopard Cat Tribe hoped the Wolf Tribe would lose the war so they could reclaim their former territory.
• Shinigami Oni revealed that he had survived his battle with Tōga, then departed to join the war and take revenge on Sesshomaru.

The King of the Underworld led the monsters against the human allied army at the Western Country–Musashi Province border, then fought the human masters who targeted him. As he killed the monk sustaining a gravity formation, a white-robed swordsman arrived to confront the attackers.

• The blood-eyed young man rallied the human allied army, and the King of the Underworld ordered the monsters to attack.
• The human army and monsters clashed as the King of the Underworld watched, while the Five Demon Wolves, Chongli, Kōga, and Inuyasha fought on the battlefield.
• The shrine maidens and other human masters attacked the King of the Underworld, who blocked their assaults with ice and countered with Slay Gods and Demons.
• The blood-eyed young man struck at the King of the Underworld's soul, and Bankotsu joined the masters' assault with Savage Dragon Break.
• A monk's runic formation slowed the King of the Underworld with gravity, but the King killed the monk with a sword strike.
• A white-robed swordsman arrived and condemned the attackers for harming the monk.

Sesshomaru and the King of the Underworld faced attacks from human warriors and rival yokai factions, prompting the King to unleash Ice Age and freeze the battlefield. After the King’s apparent death, Sesshomaru attacked Blood Eyes, but a Blood-Robed Man killed Blood Eyes and revealed himself as an ancestor demon.

• Sesshomaru arrived and fought Shinigami Oni while the King of the Underworld continued battling the human army.
• The Snow Emperor, Manten, Guigu, the Four Heavenly Kings of the Leopard Cats, and their forces joined the fight against the King of the Underworld and the Wolf Tribe.
• As enemies unleashed their strongest attacks, the King of the Underworld used Ice Age, freezing the battlefield and extinguishing the lives of everyone except Sesshomaru and the escaping Blood Eyes Youth.
• Sesshomaru grieved over the frozen King and attacked Blood Eyes, but Blood Eyes evaded his strikes and countered with God Slayer.
• A blood-red dandelion pierced Blood Eyes, and the Blood-Robed Man killed him after identifying himself as an ancestor demon.