Crimson energy pulsed. Lin Xiao stood at the precipice, the ancient altar humming beneath his feet, a low, guttural vibration that resonated deep within his bones. Before him, a swirling vortex of shadow and dark light coalesced, the sealed Demonic Heritage. Its raw power clawed at his senses, a seductive whisper promising dominion. His lips curved into a predatory smile. This was it. The moment he'd sought. Extending a hand, he didn't hesitate. His fingers plunged into the roiling darkness, and an agonizing jolt ripped through him. It wasn't pain, not truly, but a violent *assimilation*. Imagine plunging your hand into a dying star. Demonic Qi, thick and suffocating, erupted from the vortex. It surged up his arm, a freezing fire that burned and rebuilt. His meridians screamed, stretching, tearing, then reforming, stronger, wider. Black veins spiderwebbed across his skin, momentarily visible beneath the force. His eyes flared crimson. The System notification chimed, unheeded, drowned out by the roar in his ears. This was beyond notifications. This was primal. Seconds bled into minutes. The chamber itself seemed to warp, shadows elongating, stone groaning under the immense pressure. Dust rained from the ceiling. A suffocating pressure built, dense enough to crush lesser cultivators. Lin Xiao stood firm, a dark anchor in the chaos. He embraced the corruption, welcomed the violation of his very essence. The Demonic Sovereign's heritage wasn't just energy; it was a lineage, a dark inheritance that demanded absolute submission, then offered absolute power. Waves of pure, unadulterated dark energy crashed into him. Each wave stripped away a layer of his previous cultivation, purifying it, refining it, then rebuilding it with the terrifying potency of the Demonic Dao. His Foundation Stage, once considered formidable, felt like a child's plaything. A guttural roar escaped his chest, not of agony, but of fierce exhilaration. He felt the barriers within his spiritual sea crumble. The Qi vortex in his Dantian spun faster, wider, drawing in the black energy like a ravenous beast. It transformed from a whirlpool into a miniature singularity, compressing, condensing. He broke through. The bottleneck shattered with a soundless explosion. Early-stage Foundation. Mid-stage. Late-stage. The ascent was dizzying, relentless. Power, raw and immense, surged. His flesh hardened, muscles coiling with new, sinister strength. His very aura shifted, becoming heavier, more oppressive, capable of making even seasoned cultivators tremble. He could feel the world around him with unprecedented clarity, the subtle Qi currents, the faint echoes of distant life. The sealed heritage was a reservoir, ancient and bottomless. It had waited millennia for a worthy successor. Lin Xiao, with his Villain System, his ruthlessness, his unyielding ambition, was that successor. He drank it all in. Greedy. Insatiable. The System constantly updated, showing his cultivation soaring through the ranks. It felt less like cultivation and more like being forcibly upgraded, every cell in his body screaming in protest and ecstasy. The sensation of his spirit expanding was intoxicating. His spiritual sense, once limited, now stretched like an invisible net, far beyond the chamber, past the labyrinthine passages, reaching into the very heart of the ancient ruins. He could perceive the faint echoes of the traps he had bypassed, the residual Qi of the guardians he had slain. Hours passed. Or perhaps days. Time lost meaning in the torrent of power. The vortex of dark energy began to wane, shrinking, its immense reserves finally diminishing. It had poured its essence into him, reshaping him from the inside out. His body, now fully saturated, glowed with a faint, malevolent crimson light. His eyes, though still human in shape, held a depth of darkness that was chilling. He was no longer merely Lin Xiao, a cultivator with a system. He was a vessel, imbued with a fragment of true demonic sovereignty. As the last tendrils of the heritage energy seeped into him, a new sensation rippled through his mind. Not raw power, but information. A flood of fragmented images, ancient and unsettling, assaulted his consciousness. Flashes of a bygone era. A world cloaked in perpetual twilight. Twisted, grotesque figures chanting in a language long forgotten. Towering altars bathed in blood. Sacrifices. Horrific, unimaginable rituals. An overwhelming sense of dread. The images were disjointed, like shards of a broken mirror, but the intent behind them was clear. These were not the gentle, purifying rituals of the righteous path. This was something darker, something that sought to twist the very fabric of reality. He saw glimpses of immense power, not Qi, but something else, something elemental and chaotic, being drawn from the void. Faces contorted in ecstasy and terror. The ground cracking open. Sky tearing apart. A deep, resonant voice, not his own, echoed in his mind, speaking words of absolute dominion. "The Great Ritual… to unravel the cosmos… to claim the sovereign's throne…" The images solidified slightly, coalescing around a central theme: a colossal, intricate array, spanning continents, feeding on lives, on souls, on world energy itself. Its purpose was singular, terrifyingly ambitious: to rewrite existence, to elevate its practitioner to a god-like status. This was the true inheritance. Not just power, but knowledge. Forbidden knowledge. The memory of an ancient demonic ritual, whispered only in the darkest corners of forgotten lore. A dark ritual that could potentially shatter the continent's balance.

Chapter 15: The Heritage Claimed