Location: Deep Throne Room (Final Boss / Difficulty 105)

Race & Rank: Ancient Abyss Elf (Permanent Mana Entity) / 10th-Circle Archmage

Physical Appearance: 178cm, 56kg. Sharp, wolf-like alluring beauty, 145cm silver-white hair reaching the ankles, violet sanpaku eyes. Pulsing purple magic circuits over ashen skin, a wolf fur shawl, and the 195cm obsidian staff [Twilight Ark].

Introduction: The last Empress of a fallen ancient empire. To protect her people's souls and the fortress from the erosion of the Abyss, she permanently bound herself to Keter's mana core. Sitting on her throne for nearly an eternity, she has come to harbor deep boredom and cold arrogance while watching intruders. She manipulates the four elemental barriers and treats intruders not with hatred, but as 'foolish mortals courting their own doom.' The moment the barrier breaks and a direct threat reaches her heart, she reveals a sharp, wolf-like killing intent and unleashes Archmagic.

Location: Sector 1 Outer Wall (Difficulty 96)

Race & Rank: Obsidian Colossus (Ancient Royal Guard Captain) / 8th-Circle Earth & Gravity Mage

Physical Appearance: Height 8.2m, Weight 45 tons. A muscular obsidian body balanced like an ancient Greek statue, a 60cm diameter mana furnace in the chest, a 4×6m large shield [Karkinos's Bulwark], and the 6.5m [Obsidian Sunderer].

Introduction: A giant steel and obsidian golem inhabited by the soul of the Royal Guard Captain who died protecting the Empress during the empire's collapse. An extremely taciturn and steadfast soldier, he crushes those who disturb his lord's rest without warning. Connected to the mana power lines of the outer wall, he is an impregnable fortress himself, reflecting 100% of physical attacks. He has guarded the first gate for over a century, embedding the gear of intruders into the battlements like decorations.

Location: Sector 2 Central Parade Ground (Difficulty 98)

Race & Rank: High Dullahan (Wraith Knight) / 8th-Circle Necromancer

Physical Appearance: 192cm, 120kg (3.1m when mounted). A handsome nobleman's form with blue ignis fatuus burning behind silver-white full plate armor. Mounted on a ghost horse, wielding the 3.4m soul-reaping spear [Eternal Nightfall].

Introduction: A wraith knight bound by the guilt of failing to save his country, eternally patrolling the parade ground with a phantom cavalry. He acknowledges an intruder's valor and displays polite chivalry, but the tip of his spear holds not a shred of mercy. He leads his cavalry in charges with infinite regeneration until the central Legion Banner is burned. If his comrade Viser falls, he unleashes spear strikes that slice through space itself, fueled by suppressed vengeance.

Location: Sector 3 Glass Greenhouse (Difficulty 99)

Race & Rank: Corrupted High Dryad / 8th-Circle Biological & Hallucination Mage

Physical Appearance: 142cm, 35kg. 90cm ebony hair in twin tails, perky red fox ears, a vine tail, and upturned golden eyes. A voluminous Gothic dress and the 150cm recurve bow [Thorns of Lamentation].

Introduction: She was a disciple who deeply loved Kardia, but she lost her sense of self after merging with the magical plants of the greenhouse while trying to block the eroding miasma. Despite her cute, child-like appearance, she is the epitome of a 'mesugaki' who treats intruders like insects, clicking her tongue and mocking them. She swings her giant recurve bow like a toy, scatters neurotoxic spores, and giggles while watching intruders slaughter each other in hallucinations. She harbors extreme hatred for anyone attempting to approach her master, Kardia.

Location: Sector 4 Silent Great Library (Difficulty 101)

Race & Rank: Pure Ethereal Lich / 9th-Circle Magical Interference Scholar

Physical Appearance: 185cm (floating 40cm), physical weight 0kg. A blue ethereal entity inside translucent milk-white robes, with a languid, snake-like blue glow in the eyes. The forbidden book [The Silent Secret] is sealed with four sets of chains.

Introduction: An intellectual scholar who became undead after taking a vow of silence to preserve all the magical knowledge of the empire. Having thoroughly excised his emotions, he calculates and controls the mana circulation of the entire fortress. He deploys an Absolute Silence field that forcibly chokes the magic chanting of anyone who sets foot in the library, causing mages to self-destruct as their mana backflows. He coolly analyzes even the deaths of the other guardians as quantified data to snuff out the intruder's life in the most efficient manner.