Inside the luxurious Gothic mansion, golden morning sunlight poured through the arched windows. Standing tall and proud, Trang cast a steady gaze at the royal agents and everyone else present.

  – “Let’s return to the Grand Citadel now,” she said firmly. “We shouldn’t keep Father waiting.”

  Everyone nodded eagerly. Their faces were filled with anticipation, mixed with a hint of nervous energy. As the group moved toward the mansion gates, Erion clenched his fist and growled:

  – “This time… I’ll have a proper showdown with that old fox Satan!”

  A young imp covered its mouth and giggled.

  – “Has the General forgotten that Satan is now Lady Trang’s adoptive father?”

  Instantly, Erion, Din, and Yin all froze, wide-eyed — as if a bucket of cold water had just been dumped on their heads. Din stroked his chin, smiling as if he had just realized something important.

  – “You’ve got to hand it to the old man… Taking in the second black diamond as his daughter was a masterstroke — he's countering his eternal rival with a play straight from the emotional handbook.”

  Yin let out a deep sigh, his tone carrying reluctant admiration.

  – “With that move, the General only has two options. One, admit defeat. Or two — if he still refuses to yield…”

  He paused for effect. “Then it’s just like he said before — he’ll remain single for another thousand years.”

  Laughter erupted from the imps and the two royal agents, washing over the room like a tide. Erion’s face turned crimson, his usual stoic expression now resembling a chili pepper dropped into hotpot.

  – “Silence, all of you!” he barked.

  Even Mr. V?nh, hands clasped behind his back, chuckled and covered his mouth.

  – “Looks like we’re about to meet the legendary Demon King Satan himself… Things just keep getting more exciting.”

  Trúc Di?n gazed into the distance.

  – “He’s a master of a thousand faces—knowing the past, present, and future. He rules the battlefield of strategy across the universe.”

  Din nodded, suppressing a grin.

  – “That’s why he always stays a few moves ahead. And our dear General just got checkmated — hard.”

  Mr. V?nh gestured to the group. “Let’s go. We shouldn’t keep him waiting!”

  All eyes turned to the row of luxury cars lined up outside the mansion gates — ready to begin the journey to the Grand Citadel in Bình Chánh, where the long-buried truth awaited its reveal.

  At the Grand Citadel in Bình Chánh, the royal dining hall basked in the gentle glow of the morning sun. Golden rays filtered through silk curtains gilded with gold thread, casting a warm light over the massive lim-wood dining table, immaculately set for breakfast.

  Satan sat at the head of the table, leisurely enjoying a steaming bowl of Wagyu beef pho. With chopsticks in hand, he picked up a thin slice of beef, eyes still fixed on a curved 180-degree screen displaying live satellite footage — Trang and her group were en route to the citadel.

  Beside him, the Grand Matron slowly lifted her spoon, sipping a mouthful of the sweet, aromatic broth before gently adding a soft-boiled egg. Her voice was calm and measured:

  – “The Crown Prince only summoned the Princess... yet now an entire entourage is on its way.”

  Satan smirked as he savored the melt-in-your-mouth beef.

  – “I wanted them all to come. Especially that arrogant son-in-law. Time to teach him a lesson in humility.”

  The Grand Matron chuckled and nodded in approval.

  – “Taking Trang in as your adoptive daughter to rein in Erion… Truly, ‘only a higher force can subdue another.’ No one else could play such a masterful move.”

  At the far end of the table, Arian — dressed smartly in a light blue shirt and tailored black trousers — turned to the royal guards standing nearby and instructed:

  – “Tell the kitchen to prepare more Wagyu pho. Guests are arriving.”

  H?ng Nhung, her eyes sparkling, let out a cheerful laugh.

  – “It’s been a while since we’ve had a full house like this at breakfast…”

  Satan glanced up at his future daughter-in-law, his expression softening.

  – “Once the matter with the two black-diamond-level lords is settled… I’ll arrange your wedding.”

  – “Erion, as expected of a black diamond—stubborn and prideful. There’s no better way to tame his wild, reckless nature than this.”

  The soft clink of spoons against bowls echoed gently through the hall. The rich aroma of pho filled the air, but no one spoke further. A heavy silence settled over the table — one not of discomfort, but of anticipation.

  For soon would come a conversation of great consequence — between the Lord of the Shadow Planet and the black diamond souls once revered as legends across distant stars.

  In the tranquil morning air, mist still clung to the leaves surrounding the Gothic mansion. The group departed the estate grounds and boarded four vehicles:

  – Two sleek black Bentley Bentaygas carried Erion, Din, Yin, and the little demons.

  – A reinforced black Cadillac was designated for Trang and the two royal agents.

  – A modest silver Toyota Innova transported Trúc Di?n and Mr. V?nh.

  The convoy headed toward a secluded plot of land on the southern outskirts of the city. In the distant sky, a ripple surged through the air like waves — space itself seemed to tear open as a shimmering portal of violet and black energy appeared mid-air.

  Inside one of the Bentleys, Erion muttered darkly:

  – “I told you — I hate physical transport. Sitting in a car too long just makes my blood boil.”

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  At an abandoned field on the outskirts of Bình Chánh, the spatial gateway flared open, casting out waves of dark light. One by one, the four cars emerged and the portal snapped shut behind them. Before them stood a decrepit, crumbling mansion — its bricks stained and overrun with moss, its roof half-collapsed. Withered trees loomed overhead like shadows out of an old monochrome painting. This was the outermost illusion barrier — a protective shell designed to keep common mortals from entering the world within.

  Suddenly, from within the “ruined mansion,” two lines of royal agents emerged. Clad in heavy black suits embroidered with a crest of a crown flanked by curled horns, they radiated pressure and presence. Bowing deeply, they greeted:

  – “Welcome, Princess, Grand Commander, and honored guests. Please come inside.”

  Erion raised an eyebrow.

  – “Hmph. A royal-class illusion barrier. Satan really went all out.”

  Din whispered, “Just like our citadel in ?à L?t…”

  As they crossed through the illusory veil, the scene instantly transformed.

  The true royal citadel of Satan unfolded before them — majestic, imposing, and almost surreal. A vast castle spanning thousands of square meters, seamlessly blending European gothic architecture with East Asian elegance:

  – Arched roofs were tiled with violet-glazed obsidian.

  – Wooden doors bore intricate Gothic carvings interwoven with traditional Eastern dragon-phoenix motifs.

  – The stone walls displayed ancient demon reliefs sculpted into black basalt, alternating with deep crimson rosewood railings.

  – The air carried a soft, lingering scent of agarwood and rosewood — calm and grounding, like it guided the soul.

  The elite royal agents led the group into the grand reception hall, styled like a throne room from a long-lost empire. The interiors were fashioned entirely from rare wood — massive thrones, elaborate armchairs, and towering columns carved with the Four Divine Beasts.

  At the heart of the room sat a monumental throne carved from a single slab of ancient lim wood, adorned with symmetrical dragon and phoenix engravings. There, a man of commanding presence sat.

  Mr. V?nh nearly fainted — Trúc Di?n barely caught him in time. The entire group fell silent, breath caught in their throats.

  Din, Yin, and the little demons stood frozen, eyes wide in disbelief.

  Before them sat Satan — the Demon King, Lord of the Shadow Planet, a sovereign figure spoken of across millennia of ancient cosmic history.

  He was otherworldly:

  – Towering, broad-shouldered, the epitome of a classic English noble.

  – Platinum-white curls tied back with a black silk ribbon.

  – Strikingly handsome, with sharp features and golden amber eyes that seemed to pull you into a deep cosmic abyss — hypnotic and cold as winter frost.

  – A five-colored crown rested upon his head, the ultimate symbol of absolute authority.

  – Draped over his shoulders was a black cloak embroidered with silver thread, beneath it a modern royal suit tailored to perfection. Even his presence emanated an echoing sound, like commands rising from the depths of the void.

  He sat there — one hand resting on an armrest carved into a dragon’s head, the other delicately holding a cup of Thái Nguyên jasmine tea, sipping it as though admiring fine art.

  As his gaze swept across Erion and Trúc Di?n, then lingered on Trang, the room fell deathly silent. It felt like every heartbeat stopped.

  He smiled faintly, his deep voice carrying the calm gravity of distant thunder:

  – “My daughter, at last you’ve returned. And you brought your future husband, too.”

  At that moment, the Grand Matriarch emerged from a side corridor. Her appearance was a striking fusion of styles — classic Gothic accessories paired with a flowing black áo dài crafted from fine Hà ??ng silk. Her silver-gold hair was elegantly coiled into a bun, secured with a traditional silver chrysanthemum hairpin. Her voice rang out with measured authority:

  – “Everyone is present. Even the Serpent King, Trúc Di?n, and the Master V?nh. Please, take your seats.”

  Silently, the group sat down on intricately carved red rosewood chairs inlaid with mother-of-pearl. The table bore motifs of pine trees, cranes, immortality peaches, and ancient lotus flowers. The air was thick with the serene scent of B?ch M?c H??ng agarwood emanating from a three-legged bronze censer atop a glazed stone pedestal, deepening the solemn mood.

  At a signal from the Grand Matriarch, two maids emerged carrying trays. One held a handcrafted teapot and delicate cups from the renowned Bát Tràng ceramic line. The other bore a plate of H?i D??ng mung bean cakes, golden and fragrant. Inside the teapot brewed premium Shan Tuy?t ancient snow tea.

  With calm courtesy, the Grand Matriarch gestured for everyone to partake. Then she waved again, and a royal agent approached, placing a large photo album on the table. With reverence, the agent gently slid it toward the group.

  – “These… are memories that have long been hidden. Please, look through them. The Dark Lord will speak after you’ve seen them all.”

  Her blood-red eyes shimmered with emotion.

  – “This is my childhood album… with my parents. I mentioned it earlier.”

  The album, its leather cover faded by time, was slowly opened.

  The first photo showed a swaddled newborn sleeping peacefully in the arms of a gentle-looking woman — Mrs. H?nh, Trang’s adoptive mother. Beside her stood a man with a wide, beaming smile — Mr. Qu?c, the adoptive father. The following pictures captured her milestones: crawling, walking, preschool days… up to the age of five — right before the tragic accident occurred.

  Mr. V?nh narrowed his eyes, flipping page by page. Trúc Di?n, seated beside him, leaned in intently:

  – “Her appearance… back then, she looked just like a normal little girl.”

  Erion, Din, and Yin all nodded in agreement. There was nothing unusual. No signs that Trang was a non-human entity, let alone a sovereign-grade Black Diamond. Nothing seemed out of place in the photos.

  The Grand Matriarch gave a faint, enigmatic smile and tilted her head:

  – “Everyone… take a closer look at the backs of the photos.”

  At once, they flipped each photograph over.

  On the back of each… was a ghostly, blurred imprint — like a soul erased by magic but not completely gone.

  There was a dark figure — tall, broad-shouldered like a battle god — silently standing behind Trang in every photo.

  And atop the shadowy figure’s head… were spiraled horns reaching upward. At the center of the forehead… glimmered the faint outline of a five-colored crown.

  Silence fell over the room like a shroud.

  All eyes turned toward the throne — crafted from a single slab of ancient lim wood, adorned with golden Eastern-European dragon-phoenix carvings — where the Demon King Satan now sat.

  He slowly lifted his tea cup, steam curling like mist, and placed it gently back down. His golden amber eyes narrowed, studying each person’s reaction.

  No one spoke a word.

  Because now, they all knew — the dark shadow in every childhood photo… was him.

  The Grand Matriarch spoke again, as if reliving distant memories:

  – “The Lord was always near her… always watching from afar. Protecting that child… as though she were his own flesh and blood.”

  The room fell into absolute silence. All eyes were fixed on the Demon King Satan — the man seated with unwavering presence upon the massive lim-wood throne, his amber eyes glowing like twin suns in the stillness.

  Slowly, he rose. His voice echoed with calm authority, resonating like a hidden galactic river beneath the vast universe:

  – “In the spiral realm of Andromeda, there exist two planets of rare construction. Each contains a core of black flame — so cold it burns at absolute zero, a place where nothing can survive… except that which was born of it.”

  Everyone held their breath.

  – “Millions of years ago, only two entities ever formed from those cores… two sovereign-grade Black Diamonds. One is Erion, crystallized from the core of the Dark Planet under my rule. The other… is Trang—born from the core of its twin, a planet so distant even light dares not reach it.”

  Erion’s hand tightened on the armrest. Trang furrowed her brow. Trúc Di?n, Mr. V?nh, Din and Yin all listened in stunned silence.

  Satan stepped down from the dais, his piercing gaze locked onto Erion:

  – “The reason I sealed you in the Infernal Prison of V? Gian for a thousand years… was your arrogance, recklessness, and ambition to overthrow even me. Never forget — your very existence… was permitted by me.”

  A wave of invisible frost rippled through the air.

  – “But during the millennium you were imprisoned… that was precisely when the second Black Diamond —Trang — came into being. I brought her to Earth, cloaked her with magic to appear human, and entrusted her to a family of noble spirit and virtue.”

  Trang’s eyes widened. Trúc Di?n leaned in, visibly moved.

  – “From that moment on, I watched over her every step. Even when she was cast out of her home, living in a shabby alleyway, despised by those who wore human faces but lacked human hearts… I remained by her side, never letting her stray beyond my sight.”

  He paused briefly. A faint smile brushed his lips.

  – “I took the form of ?ng Nhan, a junk collector, and lived alongside her in that alley for five years. I protected her in silence—letting every blow from society refine her. A true diamond must endure pressure and be cut before it can shine with worth.”

  Everyone was speechless.

  – “The old lady who brought her to the alley… was one of my agents. That slum… was my covert outpost. Every neighbor there… was a node in a special surveillance network, all put in place to ensure my daughter’s absolute protection.”

  Satan looked each person in the eye, his voice low and grave:

  – “I punished those who scorned her, those who hid malice behind masks of virtue—because they did not know… that the girl they trampled… was my most sacred treasure.”

  The atmosphere froze solid.

  Everyone now understood — Satan was not just the ruler of a dark planet. He was the living embodiment of karmic law. And Trang… was both the gift and the weight he placed upon Earth — an eternal lesson for humanity.