Reincarnation of Nikola Tesla in another world-Chapter 10: Beautiful adventure

Shadowfen. Just the name made your skin crawl; this wasn't land, it was a wound. The Gulbarg Kingdom, all weak sunlight and human weakness, ended here, giving way to the Demon Domain, a realm sculpted from perpetual twilight and something far darker. This borderland was more than just a line on a map; it was a constant battle, a never-ending tension between order and chaos, life and something _else_ entirely.

Humans called the Ancient Pact "peace," but demons knew better – it was a joke waiting for the punchline. For centuries, it had mostly held, preventing all-out wars, but the edges were always bleeding, constantly tested.

They said Heroes kept the balance. The Human Hero, a myth nobody ever saw, hidden somewhere in the light. The Demon Hero, his dark counterpart, just as elusive in the shadows. Two guardians holding back a flood that felt inevitable.

Shadowfen itself was a nightmare made real: twisted trees like broken bones clawing at a sky that was always bruised purple. The air hung thick and cold, tasting of wet rot and a fiery sulfur tang. Underfoot, black mud squelched and gnarled roots twisted, swallowing sound and light alike. No place you'd willingly visit unless you were already hollow inside.

Deep in Shadowfen's guts, within a cavern that felt like a dead god's maw, sat the Demon King. Not a king in any human sense; he was more like the epicenter of wrongness, shadow made solid, power you could _feel_ pressing down, heavy enough to crush you.

He sat on a throne of black bone, but your gaze didn't linger on the throne – it was fixed, instead, on _him_, or rather, on trying to fixate on _him_. He shifted, always shifting, shadows playing within shadows, making it nearly impossible to truly grasp what he _looked_ like, only that he felt fundamentally, terrifyingly _wrong_.

Around him moved _them_: succubuses, always present, always close. Their smiles were predatory, their eyes promises of things you shouldn't crave. Lust, given form.

Other shapes lurked deeper in the cavern's shadows – bloated, oozing things that embodied Gluttony, and tall, gaunt figures radiating icy Pride, staring down on all creation. The air itself wasn't just dark; it was _tainted_, heavy with sin made manifest.

Then, even in the Demon King's dim domain, something flickered – a ripple of wrongness from _beyond_ Shadowfen. Human lands.

The Demon King sensed it: an energy spike, unnatural blooming in the weak human world. Not demon, not Shadowfen chaos – something _other_.

He considered it, his thoughts slow "human magic is usually pathetic, like children with firecrackers, but _this_... this had an unusual edge, something's _off_".

Focusing his will, he reached out, senses like tendrils of shadow extending outwards, seeking the lingering trace . Yes, a magical signature, faint but distinct, undeniably not demon, not elemental, but something... _alien_.

Intrigue, a spark rare in the Demon King's ancient mind, flickered. Curiosity, even rarer. This... this demanded answers. He needed to know what entered in the human world.

He looked, not with eyes, but with a deeper sense, focusing on a figure kneeling in the cavern's shadows, almost at the edge of his perception: Lilith. His right hand. His sharpest blade. Most... _useful_.

His thought cut through the cavern's gloom, aimed directly at her mind: "_Border. Disturbance. Human lands._"

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Images flashed in her mind too – human faces etched with terror, the chaotic energy spike. His order were given, concise: "_Unnatural . Investigate. Report._"

Lilith lowered her head further, obsidian armor cool against the cavern stone. Silver-streaked black hair spilled forward, obscuring the molten gold shade of her eyes. "As you command, my King," she replied.

She rose, a fluid motion like dark smoke, and turned, her silhouette sharp and elegant even in the dim light. Her grace was predatory, each movement precise, hinting at the power coiled beneath her obsidian armor.

Her lips, full and plump like overripe dark fruit, remained closed showing incisors. Despite her armor, the womanly curve of her bosom was subtly apparent, even in this domain of demons. A faint scent, not of perfume, but of ozone and something wild, untamed, a purely _demonic_ womanly scent, drifted from her, barely perceptible yet present. To human eyes, she would be breathtakingly beautiful, a vision of angel in a nightmare. To demons, she was... useful, possessing a sharp blade, yielding forms they often associated with human, yet undeniably compelling in her own right.

She left the sin-cavern and stepped into Shadowfen air – thick, nasty stuff. Heading towards the border ravine, she felt the air twist even more, everyone knew the veil was thinning, the border a weak point. a jagged scar in the land, the weakest spot.

Walking? Amateur move. Instead, shadow shift_. Her armor, black glass, seemed to melt down,her body appeared tightening up, silhouette sharpening and streamlining.

Speed was next, not running - kid stuff – but a blur. Her body became a flicker, like shadow reaching before light, her essence itself compressed, her demon form flattened to almost nothing as she slipped through the crack.

Reality itself resisted, the air around the gap screaming, pushing back. A heartbeat of strain, then sheer speed and form-shift combining in a final surge.

On the other side the velocity threw her forward before she landed lightly in the human forest.

Human forest now, still dark, still woods, but the air is different – bit lighter, less gloomy; Shadowfen's weight is gone.

"King's finally interested_. And honestly? So am I. Could be fun, Real fun. Not just... _hand_ fun." She laughed, low, pleased sound. "Needed something more interesting than my own hand for a while." She licked her lips, a flash of a real, sharp grin. "Bersley's about to get a visitor. Let's see if these humans can even scream properly when they burn."