In a dark room filled with mist...
Leon stood in the center of a circle of glowing purple symbols, the system before him, appearing more unclear than ever. The air around him was thick, as if every particle was pressing down on his body.
System: "You have reached the test of lust, Leon. This is the final test before the completion of the seven sins. But lust is not just desire... it is beyond the surface, it is the passion that pushes you to your limits. With it, comes the hardest choice you will ever face."
Leon (coldly): "Your choices have never been easy. Go on, show me what you have."
Three figures appeared before him, all chained with dark energy.
The first: Rias, tightly bound, her eyes glowing with anger, but she continued to look at him defiantly.
The second: The child from his past, the one with whom he shared an old bond, representing his inner pain and harsh past. She silently cried, her eyes filled with innocence and fear.
The third: Another version of Leon himself, but weak and fragile, representing the version of him he had always wanted to escape from.
System: "These three stand before you, Leon. Lust does not only mean a choice, but also sacrifice. You must choose one of them. One will live, and the others will be erased entirely from existence. Choose wisely, for the one you choose will shape your future, and those you sacrifice will disappear from your memories and the memories of everyone forever."
Leon (in a low, thoughtful voice): "... One choice? This sounds familiar. It sounds... weak."
System: "This is not a game, Leon. Every choice comes with a price. If you choose wrong, your strength will fade, and you will fail to awaken lust."
In a moment of tense silence...
Leon looked at each of them carefully. Rias did not speak, but her eyes challenged him, as if saying: "I am too strong to be just a choice." The child pleaded with him with innocent eyes, while the other version of himself remained silent, as if resigned to its fate.
Leon (with a commanding, cold tone): "A choice? No, I will not allow you or any force to put me in this position. I will choose all three."
System: "What are you saying? Sacrifice is not a multiple-choice! You must let one live, and erase the others!"
Leon (approaching the three figures): "You don't understand me, system. I do not sacrifice. I do not choose. I will control all, and refuse to bow to these foolish rules."
Leon stretched out his hand and released a wave of dark energy that shattered the chains binding the three figures. Rias fell to the ground, surprised but composed. The child ran toward him, but her gaze remained filled with fear. As for the other version of him, it stood beside him, as if waiting for his final decision.
System: "This is not allowed! Sins do not awaken this way. Lust requires sacrifice!"
Leon (defiantly): "I am the one who sets the rules here. Lust? It is not just sacrifice. It is control. It is owning everything... and leaving nothing behind."
Suddenly, a destructive energy swept through the place. The flaming symbols around him exploded, transforming into whirls of purple fire. His body rose into the air, beginning to transform.
System (with a pleased voice): "Congratulations, you have broken the rules... all the sins have awakened. Well done, Leon. This is a new birth, a new future, an existence that will shake the world. But remember, the seven sins will undoubtedly make you the strongest, but they will not leave you without a price!"
Leon fell to the ground, screaming in intense pain. His body began to tear apart and re-form. Huge black wings emerged from his back, while his skin cracked, revealing a black mark on his forehead. His eyes turned black, as if staring into the abyss. His body transformed, now possessing seven hearts, each wrapped in a distinct color, glowing with different colors mixed with black, symbolizing each sin and its connection to darkness:
Pride: A glowing golden hue surrounds his first heart.
Gluttony: Pulses of red glow, representing an unending hunger in his second heart.
Greed: Toxic green energy rises from his third heart.
Wrath: Orange flames ignite from his fourth heart.
Envy: A cold blue color surrounds his fifth heart.
Sloth: Gray energy gives him an almost weightless appearance in his sixth heart.
Lust: A glowing purple hue wraps around his seventh heart, pulsing with indescribable strength.
His body now contained seven hearts, each one beating with the energy of a sin, each pulse screaming of its sin.
Leon (rising slowly, his voice deep and terrifying): "The test is over. The rules are over. Now... I am the master, and the sins are at my command."
In that moment, the world felt the birth of a king...
---
In the Underworld...
In a grand castle surrounded by mysterious blue flames, Serzech Lucifer, the Devil King and older brother of Rias Grimory, sat working on official documents with unusual focus. Beside him stood Gravia Lucifuge, his wife and queen, calm as ever, but her silver eyes watched every movement in the room. Suddenly, the air around them trembled, and Serzech felt a strange energy briefly sweep through the place, enough to freeze the blood in his veins.
Serzech (rising suddenly, his voice filled with concern): "What is this power? It's dark, but... strangely pure. It is not just demonic energy, but something entirely different."
Gravia (calmly): "This power is unnatural, my lord. I felt it too. It does not belong to any of the known devils or maou. Could it be a new threat?"
Serzech (seriously): "I cannot ignore this. Gravia, send an invitation for an emergency meeting with the four maou. They must have felt this power too. We need to identify the source before it disrupts the balance of the underworld."
Gravia (bowing): "As you command."
---
In the Fallen Angels' headquarters...
Azazel, the leader of the fallen angels, sat on his black throne in their central headquarters, holding one of his sacred weapons and working on improving it. Suddenly, he stopped and felt a massive energy sweep through his being for a moment.
Azazel (closing his eyes): "What is this? Such depth and darkness in the energy... but it's not chaotic. It's disturbingly organized."
Behind him, Vali Lucifer, the bearer of the Sacred White Dragon, appeared with an excited smile on his face.
Vali: "Azazel, did you feel it too? This energy... fascinating. It's not just demonic. I think this could be an opponent worth fighting."
Azazel (sighing): "Vali, not everything is worth fighting. This energy could be a bad omen for all of us. But I admit... my curiosity is also killing me."
---
In the sky...
Michael, the Supreme Leader of the Angels, sat in a cathedral radiating with holy light. He was meditating peacefully until the darkness pierced his world for a moment. He stood up suddenly, his eyes glowing with concern.
Michael (with a voice full of reverence): "My God... this darkness is unlike any other. It carries within it the sins of humanity, but it is not random. It is a great danger to the balance between light and darkness."
---
In an unknown place...
In a room filled with emptiness, Ophius, the Dragon of Infinity, sat with a cold yet alluring expression. She felt the brief surge of energy, and a slight smile appeared on her lips.
Ophis (softly): "This... is interesting."
---
Back to Leon...
Leon stood amidst the devastation. His body had fully transformed; massive black wings extended from his back, and each of his seven hearts now pulsed with distinctive energy representing a different sin.
Pride pulses with golden light.
Gluttony burns red.
Greed emits toxic green energy.
Wrath glows orange.
Envy envelops him with cold blue.
Sloth pulses with gray energy, making him seem weightless.
Lust wraps him in glowing purple.
The energy around him caused the ground beneath to crack, and the air grew heavy for everyone nearby.
Leon (smiling confidently): "The seven sins... they are all mine now. The world tried to control me, but those days are over. From now on, I set the rules."
He looked at the horizon, where dark clouds began to gather, as if the world itself was responding to his new birth.
Leon (in a quiet, terrifying voice): "The world tried to control me. Now... it's my turn."