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A vast cathedral-like hall of dark biomechanical architecture where god rays fall on a towering glowing blue crystal, tiny figures at its base.

Dungeons

Nightmare Bosses

26 solo boss challenges across 4 layers. Each boss has up to 10 challenge levels with rising recommended power — first clears award a one-time bonus, and every repeat clear pays a scaling reward.

Entries: holds up to 14 · +2/day at 16:00 · up to 30 more via charge items · server time, provisional

Cleared levels can be swept instantly withInstant Clear Ticket: Nightmare (Bound)(×1 per sweep, up to 50 sweeps).

All 26 bossesEnrageStaggerAuto-Analysis Mode

Every boss at a glance

BossLayerZoneRec. powerUnlocked by
Gatekeeper PinopiLayer IRoot Cellar1,000–1,600—
Furious FerukLayer IDranactus Underkeep1,000–1,600—
Fafnir's Poison BloodLayer IRoot of the Sacred Tree1,000–1,600—
Wraith GiselleLayer ICrypt1,000–1,600—
Fortress Guardian NotunLayer IDestruction Archon Underground Fortress1,700–2,300Gatekeeper Pinopi & Furious Feruk Lv 10
Mutated GerodLayer IBlades Hideout1,700–2,300Fafnir's Poison Blood & Wraith Giselle Lv 10
Zikel's ApparitionLayer IImpetusium2,400–3,000Fortress Guardian Notun & Mutated Gerod Lv 10
Mutated UlgornLayer IIBlades Hideout2,500–2,950Zikel's Apparition Lv 1
Soulreaper RathmanLayer IICollapsed Oracle2,500–2,950Zikel's Apparition Lv 1
Sharp AulakLayer IIAullaeu Altar2,500–2,950Zikel's Apparition Lv 1
Sealed SuraLayer IICoastal Cave2,500–2,950Zikel's Apparition Lv 1
Enraged RedaLayer IIIllusion Hideout3,000–3,450Mutated Ulgorn & Soulreaper Rathman Lv 10
Warden SantrasLayer IIDranactus Underkeep3,000–3,450Sharp Aulak & Sealed Sura Lv 10
Kaisinel's IllusionLayer IIArdus Shrine3,500–3,950Enraged Reda & Warden Santras Lv 10
Sanctum Guardian GaussLayer IIIIllusion Sanctum3,000–3,450Kaisinel's Illusion Lv 1
Ritualist AulisaLayer IIIAullaeu Altar3,000–3,450Kaisinel's Illusion Lv 1
Root Mythical Bird AultrossLayer IIIRoot Cellar3,000–3,450Kaisinel's Illusion Lv 1
Oathbreaker GartuaLayer IIIEtheria Rift3,000–3,450Kaisinel's Illusion Lv 1
Incarnated Warding FeatherLayer IIIZumion Relic Storage3,500–3,950Sanctum Guardian Gauss & Ritualist Aulisa Lv 10
Modified BargottLayer IIINahid Disposal Plant3,500–3,950Root Mythical Bird Aultross & Oathbreaker Gartua Lv 10
Tyrant TassinLayer IIIZikel's Sanctum4,000–4,200Incarnated Warding Feather & Modified Bargott Lv 10
Lieutenant HebranLayer IVLight Crash Site3,500–3,950Tyrant Tassin Lv 1
Kromede's DesireLayer IVFire Temple3,500–3,950Tyrant Tassin Lv 1
Culminant PatonLayer IVLepharist Research Center4,000–4,450Lieutenant Hebran Lv 10
Scout Captain KedLayer IVFountain of Life4,000–4,450Kromede's Desire Lv 10
Ascended AtheronLayer IVLepharist Research Center4,500–4,950Culminant Paton & Scout Captain Ked Lv 10

Layer I

Gatekeeper Pinopi

Root Cellar10 levels
Story

Pino, a towering wooden doll brought to life through Aullaeu sorcery to serve as the altar's guardian. A shamanic emblem of the Aullaeu is carved into the center of its chest, marking its sacred purpose.

Recommended power 1,000–1,600

Challenge levels & rewards

Furious Feruk

Dranactus Underkeep10 levels
Story

A mutated Varg that has grown immensely in both size and ferocity. Portions of its body have mineralized into armor-like plating, making it even more formidable. Any lingering trace of its humanity has long since vanished, leaving it a mindless, uncontrollable beast incapable of communication. It tears through its foes with massive, mineralized claws.

Recommended power 1,000–1,600

Challenge levels & rewards

Fafnir's Poison Blood

Root of the Sacred Tree10 levels
Story

A mass of coagulated blood that fell from the body of Dragon Lord Fafnir, twisted into a poisonous, sentient abomination. It lashes out with sticky tendrils, attacking by spewing toxic blood at its prey. Left unchecked, it absorbs nearby blood clots to grow ever larger and more powerful.

Recommended power 1,000–1,600

Challenge levels & rewards

Wraith Giselle

Crypt10 levels
Story

A woman buried alive within an Altgard crypt, who returned as a Karas. Once an ordinary girl, she was unjustly sacrificed and sealed away without reason. Even in undeath, she could not forget the profound hatred born from that betrayal. The tune she once hummed in her final moments has long since twisted into something else, now escaping her only as mournful wails and broken sobs.

Recommended power 1,000–1,600

Challenge levels & rewards

Fortress Guardian Notun

Destruction Archon Underground Fortress10 levelsUnlock: clear Gatekeeper Pinopi & Furious Feruk Lv 10
Story

Armor once worn by the Destruction Archons, imbued with their indomitable fighting spirit and the power of Empyrean Lord Zikel, who personally blessed and bestowed it. Though its wearer is long gone, the armor still believes itself to be a soldier defending the Underground Fortress. It regards all who approach as intruders, leaving no possibility for communication.

Recommended power 1,700–2,300

Challenge levels & rewards

Mutated Gerod

Blades Hideout10 levelsUnlock: clear Fafnir's Poison Blood & Wraith Giselle Lv 10
Story

Gerod, leader of the Blades, after augmenting his body with Fafnite. Through his studies of Fafnite, he discovered its power to harness the souls within and use them to strengthen his own body. Yet the transformation came at a cost. Once his form had fully mutated, even he could no longer return to his original Daeva state.

Recommended power 1,700–2,300

Challenge levels & rewards

Zikel's Apparition

Impetusium10 levelsUnlock: clear Fortress Guardian Notun & Mutated Gerod Lv 10
Story

An echo of Empyrean Lord Zikel, once the revered protector of Gladiators and Templars. He invoked the Blood Oath to bring down Dragon Lord Fafnir, though he himself was ultimately destroyed in the conflict. After countless years sealed within the Impetusium, his lingering essence has faded into that of an Apparition.

Recommended power 2,400–3,000

Challenge levels & rewards

Layer II

Mutated Ulgorn

Blades Hideout10 levelsUnlock: clear Zikel's Apparition Lv 1
Story

Ulgorn, forcibly augmented with Fafnite. After being gravely injured, he was taken by the Blades and transformed into a test subject for Fafnite augmentation. Stripped of all memories, only unrelenting rage remains.

Recommended power 2,500–2,950

Challenge levels & rewards

Soulreaper Rathman

Collapsed Oracle10 levelsUnlock: clear Zikel's Apparition Lv 1
Story

An officer of the Lagta Brigade under Fafnir's command. As captain of a Dredgion, he travels far and wide harvesting Fafnite. Driven by an insatiable thirst for power, Rathman augmented his body with Fafnite, causing two blade-like growths to emerge from his arms.

Recommended power 2,500–2,950

Challenge levels & rewards

Sharp Aulak

Aullaeu Altar10 levelsUnlock: clear Zikel's Apparition Lv 1
Story

The former Chief Guardian of the Aullaeu Altar. Aulak resisted Reda’s mind-control magic for a time, but eventually succumbed, causing both his body and mind to become twisted by its influence. Once a proud guardian of the Aullaeu, he has since been reduced to a hunched and featherless creature, stripped of his former dignity. Yet even in his corrupted state, his claws remain more deadly than ever.

Recommended power 2,500–2,950

Challenge levels & rewards

Sealed Sura

Coastal Cave10 levelsUnlock: clear Zikel's Apparition Lv 1
Story

The former deputy leader of the Dawn Legion. Perion vanished while fighting alongside the legion deployed to Verteron during the Nahid Fortress Conquest War about a year ago. Presumed to have perished within the fortress laboratories, he was eventually discovered in a coastal cave, transformed into a Sura while still clinging to the necklace of his beloved, Hithanya.

Recommended power 2,500–2,950

Challenge levels & rewards

Enraged Reda

Illusion Hideout10 levelsUnlock: clear Mutated Ulgorn & Soulreaper Rathman Lv 10
Story

The former High Priestess of Kaisinel and leader of the Illusion Cavaliers, Reda was a Spiritmaster of extraordinary power and a favored servant of Empyrean Lord Kaisinel. She chose to remain beyond the Bulwark, dedicating herself to the sacred duty of protecting the Core of the Illusion God. Reda’s unwavering devotion to safeguarding the Core and her daughter sustained her through countless years of hardship. Yet this same resolve drew the resentment of others, who condemned her for abandoning the Illusion Cavaliers to their tragic fate. When her daughter was ultimately slain by the Balaur, and Phernos failed to return despite his promise, the weight of loss became unbearable. Consumed by grief and hatred, Reda was slowly transformed by the very despair she had fought so long to endure.

Recommended power 3,000–3,450

Challenge levels & rewards

Warden Santras

Dranactus Underkeep10 levelsUnlock: clear Sharp Aulak & Sealed Sura Lv 10
Story

The warden of the Dranactus Underkeep. Narcissistic and merciless, he takes pleasure in inflicting pain upon others, reveling in the suffering he causes.

Recommended power 3,000–3,450

Challenge levels & rewards

Kaisinel's Illusion

Ardus Shrine10 levelsUnlock: clear Enraged Reda & Warden Santras Lv 10
Story

An illusionary specter of Empyrean Lord Kaisinel, created from a fragment of his essence left behind before his destruction. Though only a remnant of the original Kaisinel, it retains fragments of his memories and personality, including his arrogance and irritable nature. When the Bulwark was raised, Kaisinel was destroyed, yet traces of his presence endured within the sanctum, continuing to influence the surrounding area.

Recommended power 3,500–3,950

Challenge levels & rewards

Layer III

Sanctum Guardian Gauss

Illusion Sanctum10 levelsUnlock: clear Kaisinel's Illusion Lv 1
Story

A magical knight that guards the Illusion Sanctum where Kaisinel concealed forbidden knowledge. Usually dormant in the form of ornamental armor, it awakens the moment an intruder enters the sanctum and does not rest until the threat has been eliminated. The purple glow that emanates from its body is a result of residual traces of Scarlotus, left behind when it was cast within the Illusion Sanctum.

Recommended power 3,000–3,450

Challenge levels & rewards

Ritualist Aulisa

Aullaeu Altar10 levelsUnlock: clear Kaisinel's Illusion Lv 1
Story

A ritualist who guarded the Aullaeu Altar. He resisted Reda's mind-controlling magic until the very end, choosing to end his own life rather than succumb to her influence. Aulisa's corpse, left upon the altar, mutated and became part of a tree root during resurrection.

Recommended power 3,000–3,450

Challenge levels & rewards

Root Mythical Bird Aultross

Root Cellar10 levelsUnlock: clear Kaisinel's Illusion Lv 1
Story

A bird summoned by the Aullaeu shamans of the Urugugu tribe through the borrowed power of Dragon Lord Ishtar. Believed to embody the essence of the Aullaeu, these birds serve as their protectors. An Aullaeu sorcery pattern is inscribed upon their chests.

Recommended power 3,000–3,450

Challenge levels & rewards

Oathbreaker Gartua

Etheria Rift10 levelsUnlock: clear Kaisinel's Illusion Lv 1
Story

A Spirit of Etheria who serves the Spirit King. After Kaisinel and Lumiel were destroyed, the Spirit King deemed all contracts with Daeva to have ended. He now seeks to bring every spirit under his direct control. Gartua has begun recalling to Etheria any spirits who traveled to Atreia without permission, while forcing others to sever their contracts with Spiritmasters. Gartua can freely traverse the Rift, the space between Atreia and Etheria, allowing him to manipulate and exert his influence over the fabric of space itself.

Recommended power 3,000–3,450

Challenge levels & rewards

Incarnated Warding Feather

Zumion Relic Storage10 levelsUnlock: clear Sanctum Guardian Gauss & Ritualist Aulisa Lv 10
Story

A manifestation of Zumion's Relic, the Warding Feather, taking human form within the Zumion Relic Storage. Blessed by the ancient Daeva Zumion, who was beloved by the gods, it bears an appearance resembling its creator. It was entrusted with the task of testing those who seek to break the seal, releasing the relic's power only to those who prove themselves worthy.

Recommended power 3,500–3,950

Challenge levels & rewards

Modified Bargott

Nahid Disposal Plant10 levelsUnlock: clear Root Mythical Bird Aultross & Oathbreaker Gartua Lv 10
Story

A Sura who manages the Disposal Plant at Nahid Fortress. Modified for combat specialization, it possesses formidable combat abilities but retains none of the memories, personality, or even appearance it had during its time as a Daeva. It was once deployed as a soldier to protect Ishtar Castle, but after the Dawn Legion's attack on Poeta, it was demoted and assigned to the Disposal Plant. It finds Daeva who attempt to steal from the facility to be especially annoying.

Recommended power 3,500–3,950

Challenge levels & rewards

Tyrant Tassin

Zikel's Sanctum10 levelsUnlock: clear Incarnated Warding Feather & Modified Bargott Lv 10
Story

A high-ranking officer and confidant of Gerod, he played an active role in the founding of the Blades by providing financial support. Like Gerod, he was born into a noble family of Asmodae. However, his cruel nature caused trouble from an early age, making him a burden and embarrassment to his family. Deeply obsessed with the power of Fafnite, he willingly participates in Gerod's torment of Nemon.

Recommended power 4,000–4,200

Challenge levels & rewards

Layer IV

Lieutenant Hebran

Light Crash Site10 levelsUnlock: clear Tyrant Tassin Lv 1
Story

A high-ranking member of the Lepharists, devoted follower and right-hand officer to Atheron. She hasn't received any of Atheron's enhancement procedures because she considers her to be inadequate and incapable of living up to his ideals, but she is willing to sacrifice herself on his way to godhood.

Recommended power 3,500–3,950

Challenge levels & rewards

Kromede's Desire

Fire Temple10 levelsUnlock: clear Tyrant Tassin Lv 1
Story

Kromede's ego, split by the mirror. She mustered all her strength to find the Artifact in the hopes of saving her lover, Robstin, but the Artifact she found had no such power. With all her hopes shattered, she returned to the mirror in frustration, eventually deteriorating to her current state of being, consumed by rage and desire.

Recommended power 3,500–3,950

Challenge levels & rewards

Culminant Paton

Lepharist Research Center10 levelsUnlock: clear Lieutenant Hebran Lv 10
Story

A Lepharist worshiper of Atheron. As an imperfect Daeva that cannot use his wings, he has dreamed of becoming a complete Daeva since before the fall of AION. In order undergo Atheron's surgical treatments, he did the Lepharists' dirty work, gave up all belongings, and even forsook his own family. Eventually, he receive enhancement procedures that gave him powers beyond those of a Daeva, although he has lost everything else.

Recommended power 4,000–4,450

Challenge levels & rewards

Scout Captain Ked

Fountain of Life10 levelsUnlock: clear Kromede's Desire Lv 10
Story

An elite Lepharist mage. Leader of all the Lepharists dispatched to the Ruberein Highland in order to find the Artifact. He has the ability to magically trace footsteps and has followed those traces to the Fountain of Life.

Recommended power 4,000–4,450

Challenge levels & rewards

Ascended Atheron

Lepharist Research Center10 levelsUnlock: clear Culminant Paton & Scout Captain Ked Lv 10
Story

A candidate for Arch Daeva born after the Last War and leader of the Lepharists in Elysea. He rose to his current position by helping with Dragon Lord Ishtar's Sura research, seeming to be minion of the Balaur, but was actually cultivating his own power. He is arrogant because of his genius, and has rejected Asahr's revelations as enslavement by AION. His ultimate goal is to become a god greater than the Balaur, Daeva, and even AION.

Recommended power 4,500–4,950

Challenge levels & rewards