I'm a monster in Demon King's Castle

Amidst a burst of magical dissipation, the Book Demon gradually vanished, leaving behind only two head-sized balls of blackish-purple thread on the ground; at the same time, a prompt popped up in Li Yue's mind, indicating that he had gained malice and demon points.

[Killed a high-level demon, gained 1 demon point, material 'Binding Thread', please confirm.]

Li Yue sensed the battlefield and found that the so-called "Binding Thread" was rolled together, but it was almost weightless; after confirming, the two blackish-purple balls of thread merged into his body, and the Book Demon completely ceased to exist.

Only the shattered floor and cuts in the center of the hall proved that it once stood proudly here, wielding the power of life and death.

Immediately afterwards, the magic that dissipated as the Book Demon died seemed to be drawn by some invisible force, all rushing towards the ceiling of the hall, and then disappearing from Li Yue's perception.

Li Yue pondered, put away his bone sword, looked back at the hourglass on the table, nodded, and transformed into the appearance of the Book Demon.

Creak—

The main door of the hall opened, and fifty-nine Brain Spirits cautiously crept in—the Book Demon in front of them was fine, but the Mini Minis hadn't come, and the Brain Spirits were a little nervous.

Seeing the Brain Spirits was like seeing relatives for Li Yue—Li Yue couldn't predict when Budi Boge would absorb the Brain Spirits today. If Green just arrived and absorbed them, then Li Yue could only use the second "Concealment" and go back to the middle level to deal with Keli, Ke'er, and Finley, but now...

He could save one "Concealment" and keep a trump card.

"You… enter the Chaos Gate… to replace the Mini Mini servants in sealing off the battle training…" The Book Demon's arrangement made no sense, but the Brain Spirits had no right to question it.

They rubbed against each other for a moment, turned around like zombies, and floated towards the stairs leading to the middle level of the library—Li Yue arranged for the Brain Spirits to go to the Chaos Gate for two reasons: one was to ensure the number of servants and try to stabilize the Demon Spawn inside; the other was to take the opportunity to weaken Budi Boge and reduce the possibility of him coming out to cause trouble.

Because this Brain Spirit Lord would definitely absorb Brain Spirits today, cutting off his supply at the first opportunity would allow him to continue to maintain his mentality of not daring to go out casually—as long as Budi Boge was still seriously injured, even if he came out, he could be scared back.

Watching the Brain Spirits disappear and the plan proceed as expected, Li Yue fell into deep thought, his heart in turmoil.

In the plan, this place required risk.

Li Yue weighed the gains and losses, re-analyzed the current situation, and made a choice.

Seeming to have made a great determination, Li Yue clenched his fists, transformed back into his Brain Spirit form, and followed the main force.

…

In the middle level of the library, at the entrance of the thirteenth library room, the Demon Wolf Finley and the Demon Guard Keli glared at each other, while Ke'er was still searching for Li Yue's踪跡 in each room, currently searching the eighth library room.

Because Li Yue's Book Demon killed cleanly and neatly, the Demon Spawn did not sense the abnormality in the library hall.

"If you find the skeleton, I'll be the one to kill it." With Bosch not around, Finley dared to snarl at Keli, "I've been guarding outside for so long, the skeleton should be mine."

"But you didn't find it, whoever finds it gets to kill it." Keli was still arrogant, patting Finley's head in the air, as if talking to a mount.

When a large number of Brain Spirits floated from the bottom level of the library, Ke'er, who was searching the eighth library room, heard the movement and flew back to the corridor.

"What are you inferior demons doing…? Have you seen a skeleton?" Ke'er looked suspicious, following the Brain Spirit main force.

A Brain Spirit answered the Book Demon's arrangement and limited known information, and Ke'er looked back at Keli, smelling a hint of unease.

The Brain Spirits, with orders in hand, would of course not stop because of the Demon Guard's inquiry—they floated steadily, and before long they arrived at the Chaos Gate, lining up to enter the chaotic ripples.

"Should we let them pass?" Ke'er asked Keli.

"What? Are you afraid the skeleton will sneak in? Isn't your master waiting inside?" The Demon Wolf Finley interjected sinisterly, "Or why don't you go in and take a look? I'm enough here, be careful your master dies inside, then your little lives will be useless…"

"Impudence!" Keli and Ke'er turned around at the same time, flying to the Demon Wolf Finley's face, about to start fighting again at the slightest disagreement.

"What? Not enough just now, want to try again?" Finley seemed to be deliberately provoking the two Demon Guards, "Instead of being scolded, you might as well go back and get a good night's sleep, to recover your fragile lives…"

[Should we call Lord Bosch to come and deal with him… but Lord Bosch will only finish praying to the Blood Cocoon at Blue Time… and descend again…]

The Demon Guard's inner thoughts fell into Li Yue's mind, and Li Yue also took the opportunity to silently analyze their state and movements.

Unfortunately, he still didn't know what Bosch would "pray" out, and the chessboard was still full of uncertainties—Li Yue sighed, feeling that the appearance of "Concealment" might have rung Bosch's alarm, and when he really met Bosch… the outcome was still unknown.

Li Yue trailed behind the Brain Spirit's queue, slowly approaching Keli and Ke'er at the door.

The red on the faces of the two Demon Guards deepened, shifting uncertainly, as if they would self-destruct at the slightest disagreement—the Demon Wolf Finley admired their expressions, as if enjoying the few pleasures in the library.

Staring and staring, Finley suddenly noticed… in the blink of an eye, a sword suddenly appeared on Keli's neck with bulging red veins, a sword made of bone.

"Heh… ah—" Keli wanted to say something, but only blood bubbles could emerge from her throat, and her gaze involuntarily focused on the tip of the sword protruding from her neck—the black light made her feel a burst of dizziness, and then watched it retract into her throat.

Behind Keli was the skeleton figure they had been dreaming of—Li Yue.

The dark light did not stop at all, Keli was cut in two from bottom to top, and the second heart was also cut by the bone sword, the lava-like hot blood hung on the Demon Wolf Finley's face, instantly burning the Demon Wolf's face, and the symphony of wails began in the middle level of the library.

With Keli dead, Ke'er subconsciously spread her wings and flew quickly, attempting to bypass Li Yue and escape back to the Chaos Gate to report the news, but Li Yue had already predicted Ke'er's actions in the Demon Illustrated Handbook, exerted force with both feet, and pounced towards Ke'er's position at a speed far exceeding before, the bone sword pierced Ke'er's neck head-on, forcibly pinning the Demon Guard to the wall!

"Heh… heh…" All the venomous words were swallowed by the blood bubbles in Ke'er's throat, Li Yue, enduring the hot blood sprinkled on his face and body, grabbed Ke'er's shoulder with one hand, and clenched his other hand into a palm, fiercely slamming it towards her second heart!

With a muffled "bang", Li Yue's fingertips could not pierce Ke'er's skin and bones, only causing her to scream madly in pain, and blood poured down like a small waterfall.

Li Yue had no choice but to pull out the bone sword, preparing to give Ke'er a fatal blow, but at this time the Demon Wolf Finley had already wiped away the lava on his face, and his wolf claws had already struck towards Li Yue's back, creating five cracks in the air!

Li Yue's movements did not change, his bones disintegrated, but his right hand still held the bone sword and slashed horizontally at Ke'er, wanting to cut her in two—the Demon Legion Commander could seize the Demon Guard's life, and killing Ke'er was killing Bosch.

Immediately afterwards, the sound of bone cracking rang out, Li Yue's back was grabbed into several sections by the Demon Wolf Finley's attack, but Ke'er still did not escape the fate of death, bursting out with the last malice, and was horizontally cut off in pain by a sword mark, the cracks in the upper and lower halves of her body completely matched the sword mark on the ceiling of the middle level, and then fell off.

At this moment, all the Brain Spirits who had not had time to enter the Chaos Gate had died from the Demon Guard's lava blood, and the Demon Wolf Finley could not withstand the blood plasma's eruption either, taking two steps back after succeeding, dodging the blood rain.

In the dry smell of burning bones, the bones on the ground crackled and reorganized, and Skollreik, whose half body was burned off, emerged from the blood rain, stained with blood, carrying the bone sword, his whole body's bones shaking, buzzing.

"Awooo…" The Demon Wolf Finley's throat made a slight sound, not knowing whether he was cheering himself up or falling into fear—even though he was used to seeing the blood of others, it was the first time he had seen a skeleton burned like this, still full of fighting spirit.

Li Yue held the sword, his gaze focused on the Demon Wolf Finley's lower abdomen, but he did not immediately attack.

Although his athletic ability had declined, Li Yue still retained most of his combat power, and the reason why he didn't attack at this time was actually very simple—the variable he had expected had appeared.

Not too early, not too late, not the most ideal situation, nor the worst state.

A cold thought enveloped the bones and the Demon Wolf, and a mud-like figure suddenly appeared next to the stairs—Budi Boge.

Different from killing the Book Demon, this time the commotion was a little bigger, awakening the Brain Spirit Lord.