Infinite System Inheritor Return From The Abyss-Chapter 250 249: Boss Rank Error

A deep silence filled the area. The air grew heavy, making it hard to breathe. Everyone stepped back, their instincts screaming danger.

The dungeon gate twisted and turned, turning into a deep black void. A suffocating aura spread across the area, pressing down on them like a giant hand. The ground trembled, a mild earthquake shaking the ground.

Then, a shadow stepped out.

The creature walked on two feet, its body shifting like smoke yet solid like armor. Six glowing eyes scanned the battlefield, cold and unreadable. A mirror-like core shined from its chest, reflecting distorted images of the world around it. Its wings flickered between reality and illusion, sometimes appearing solid, other times fading into mist. Black chitinous armor covered its body, strange runes glowing and changing as if rewriting its power in real time.

It was tall. The top rankers, the strongest awakeners in the country, barely reached its waist.

A loud warning blared in the global system. The sound repeated again and again, ringing in the ears of every awakener in the country. Inside the shelters, awakeners gasped as red emergency messages filled their screens. Fear spread like wildfire.

"What is this…?" Alexa's voice trembled. "The global system can't appraise it."

Her hands shook. A deep, cold fear crawled up her spine. She looked at the others. They stood firm, but she could see it in their eyes. Even the strongest among them were uneasy.

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"It's not as big as the past bosses," Ji-eun muttered, eyes locked on the monster. "But this one… feels much more dangerous."

Then, another loud warning. This time, the system managed to appraise it.

[Appraisal activated]

Name: ABYSSAL EIDOLON

Rank: ERROR

That was it. Nothing else. No weakness. No information. Just an error.

No one spoke. No one moved. The rankers stared at the monster, and the monster stared back.

This thing was beyond S-rank. Beyond any category the Global System had ever recognized. It was something else entirely.

The creature's gaze flickered over them, an unnatural intelligence behind those shifting eyes. Then, without warning—

It moved.

A blur of black and violet surged forward, a massive claw morphing into a jagged blade as it slashed down toward them. The sheer force behind the strike split the ground apart, sending a shockwave that hurled debris into the air.

"Scatter!" Tae Hyun roared, lightning crackling around him as he leaped back.

Seoha swung her burning sword, unleashing a wave of fire to intercept the attack. The flames met the black blade—and fizzled out, swallowed whole by the abyssal energy coiling around the monster's form.

"What the hell—?!" Seoha barely had time to react before the monster retaliated, its claws shifting into a spear, thrusting straight for her chest.

A burst of violet petals intercepted the strike, forcing the weapon away. "Focus, Seoha!" Ji-eun called, her Lotus Guardian forming a shimmering shield in front of them.

Dae Won grinned, excitement glinting in his eyes. "Now this is what I've been waiting for!" With a wild laugh, he charged in, both hammers swinging. "Let's see if you can handle this, you freak!"

He brought his weapons down, a devastating force crashing against the monster's chitinous armor. The impact sent a shockwave rippling through the battlefield.

For a second, nothing happened.

Then, the armor shifted.

The runes glowed a deep violet, rewriting themselves—adapting. Dae Won's hammers, unbreakable against any normal foe, groaned under the resistance, cracks forming along their enchanted surface.

"What—?" Dae Won barely had time to react before the Abyssal Eidolon retaliated, its arm shifting into a whip-like appendage, slamming into his side and sending him skidding across the ground.

"Tch." Min Joon, who had been watching silently, finally moved. His scythe twirled in his hands as he muttered an incantation. Dark mist seeped from the ground, and skeletal warriors clawed their way up, their empty eyes locking onto the creature. "Let's see how you handle the dead."

The undead lunged, swarming the Abyssal Eidolon from all sides.

For a moment, it looked like the tide was turning.

Then, the creature's mirror-core flickered.

The skeletal warriors froze.

And then—they turned, their hollow eyes now glowing the same violet hue as the monster's runes.

"Oh, shit." Min Joon swore, realization dawning too late. "It can take control—"

Before he could finish, his own undead minions turned on him, slashing with corrupted, abyss-infested blades. He barely dodged, gritting his teeth as he slashed through them with his scythe. "This thing… it's learning as we fight."

Seoyang, who had been silent until now, stepped forward, "We can't let it keep adapting." her fingers twitched, wind swirling around her.

Meanwhile, inside the shelters, awakeners fell to their knees, their faces pale with shock.

"H-How can a creature like that exist?!" one of them muttered, eyes glued to the screen.

"This is impossible! The global system can't even appraise it! The rank is 'Error'! We're doomed!"

"The end of humanity... is this it?"

Non-awakeners, confused and terrified, watched as some of the awakeners they knew suddenly lost hope. Murmurs spread among them, panic rising like wildfire.

"What's happening? Why do they look so scared?"

Among the shaken awakeners, a few tried to stay calm, reassuring the others.

"Get a grip! If we panic, what about the civilians? We need to trust the top rankers!"

Still, whispers of fear continued.

"And what is this 'Abyssal' in its name? Some of the monsters in this wave had 'Abyssal' in their titles too. What does it even mean?!"

In the other shelter where the chairman had gone, he watched the screen showing the terrifying creature. His hands trembled as he gripped the table tightly. Fear filled his heart.

"My grandchildren..." he whispered, afraid of losing them.

He closed his eyes and called upon his goddess. A soft, glowing light appeared before him.

"Alexander," the goddess spoke in a calm but serious voice.

The chairman looked up, desperation in his eyes. "Goddess! What is going on?! How is this possible?!"

The goddess looked at the recorded footage, her golden eyes scanning the details. "This... This creature is from another dimension. This is unusual."

The chairman clenched his fists. "All of these monsters already came from other dimensions. But what is with this boss? The top rankers can't handle it."

The goddess turned to him. "Show me the other footage. I need to see more."

The chairman quickly accessed the global system, switching to different recordings. The screens showed monstrous creatures appearing in different locations. Some were fighting awakeners, while others caused destruction. The goddess remained silent, watching carefully.

After a long pause, she finally spoke. "Some of these monsters... They did not come from the dimension they should be from."

The chairman frowned. "What do you mean?"

The goddess's expression turned grim. "Normally, each wave brings creatures from a specific dimension. However, some of these monsters do not belong to that dimension. They should not exist here. Something is interfering with the natural order."

The chairman's heart pounded. "Is that why the boss is different?"

The goddess nodded. "Yes. It was not meant to appear in this world. It is something far beyond what you have faced before. The system itself struggles to recognize it."

The chairman gritted his teeth. "Then what should we do?! If this creature is beyond our understanding, how do we fight it?"

The goddess looked at him with a solemn expression. "You must hold on. Until we understand what brought it here, you cannot let it take over. If it is not from its original dimension, then perhaps... there is a way to weaken it. But you must act quickly."