The stone tower has three floors.

After finishing his daily meditation, Grim slowly walked to a secret room.

In the chamber at this moment, the junior apprentice Billis was sitting cross-legged in a huge wooden barrel, his expression distorted and hideous, as if he was silently enduring some kind of great pain. The barrel was filled with a purple-black inexplicable liquid, and it also emitted a pungent fishy smell.

Seeing Grim come in, Bilis struggled to get up and salute, but was stopped.

"How's it going, is the fusion going well?" asked Grim with concern.

"All the best, my lord!" replied to Bilis, reluctantly enduring the pain, "I will definitely succeed in the fusion!"

With that, he gently lifted the blank robe on his body, revealing his bony chest and the wriggling sarcoma.

As a wandering apprentice, Bilis's body is not strong, but he is not thin. However, in only three or two days, he lost thirty or forty pounds, and he looked like he had run out of oil. And the culprit who killed him so badly was the terrible sarcoma that parasitized his chest.

At this time, a fist-sized sarcoma hung from Billis's chest, and through the almost translucent skin, a strangely shaped insect could be faintly seen wriggling and moving inside. Its head had been dug deep into Beasley's flesh, with only the small half of its body and abdominal sac remaining.

As the worm approached his heart little by little, the pain that Bilis endured intensified.

Leaning over to check the progress of the fusion between the two sides, Grim stood up straight and admonished Bilis with a solemn expression: "The mutant mother has touched your heart, and the next step will be to try to parasitize your heart and try to merge with your heart." So...... I'll ask you one last time, don't you regret it? If you do, I can interrupt the process now. Otherwise, once you cross this stage, your body will be significantly wormed in the short term. At that time, even I couldn't do anything!"

"Without the help of adults, I know that with my talent, I would never have been able to become a true wizard. So, for such a choice, I have no regrets...... Ah......h

Before he could scream, a large stream of blood gushed out of Billis's mouth like a spring. Looking at this posture of vomiting blood, his internal organs must have been severely damaged.

As soon as the bright red blood came into contact with the purple-black liquid, it was immediately absorbed in its entirety, and then replenished into Billis's body again through his skin. In the process, the purple-black liquid gradually boiled, and a strange aroma began to permeate the entire secret room.

And along with the strange fragrance, there is also a strange and charming singing voice.

This song, like a heavenly sound, is sometimes fresh and sweet, sometimes high-pitched and shocking, sometimes empty and secluded, sometimes quiet and profound...... In the midst of the song, several beautiful female krakens the size of a palm floated on the purple and black liquid, singing in unison.

However, as their singing sounded, the flesh and blood of several beautiful female krakens suddenly rotted and collapsed, turning into pools of purple-black pus and flowing into the barrels. All that was left of the scene was a lone skeleton standing there, their jaws moving and making strange noises.

At the same time, the beautiful voice that had been melodious just now turned into a vicious curse under blood and tears in the blink of an eye, and a wave of spiritual fluctuations full of strong resentment and hatred rippled in the air, and then poured into Bilis's body in a stream.

Billis clung to the edge of the barrel, his fingers picking at the sawdust flying, leaving deep scratches on the steel-solid planks.

Inside, the damn mother worm was frantically devouring his heart, and outside of his body, the curse of the strange female kraken continued to pour in, constantly eroding his soul.

After the pain was extreme, Billis slammed into the purple-black liquid, swallowed it with a lot of disgust.

The liquid in the barrel is the blood in the female Siren's body.

Looking at the weight of the barrel, I am afraid that only by draining the blood of ten female krakens can make up such a huge amount. And the female kraken is also a kind of sea clan monster that can be compared to human wizards, and the female kraken with the strength of ten high-level apprentices cost Grim 150,000 magic crystals.

The fusion of Biliss and the mutant mother is actually a process of devouring each other, in this process, it is necessary to ensure that the body of the mother worm merges and becomes the new heart core of Bilis, and the soul of the mother worm is parasitic in Bilis's soul.

The mutant mother itself has no room for self-growth, but if it is parasitic in Bilis's body, it can become strong with Bilis's growth. This is also a unique way for their race to grow!

It's just that because the fusion process is too cruel and bloody, once the host can't hold on, it will be the end of both humans and insects.

Therefore, in order to increase the success rate of fusion, Grim could only buy these Kraken blood at a high price.

Like the elven eaux-de-vie, the blood of the Siren has an amazing ability to regenerate flesh and blood. It's just that these blood are already soaked in the resentment and curse of the female krakens before they die, so using the blood of the kraken is to bear the power of this curse.

One of the main reasons why Grim chose the blood of the Kraken instead of using the water of life is that both the mother worm and Bilis have special dark soil dual attributes, and they have a serious origin conflict with the water of life. So as a last resort, even if there are serious sequelae, Grim can only choose the blood of the Kraken.

Fortunately, as long as Biliss can fuse successfully, it will be easy to get rid of these curses.

The intense physical and soul pain tortured Bilis to death, and the whole person curled up in a ball, completely soaked in the blood of the Kraken, silently bearing the terrible pain of the worm mother's heart.

Bright red blood spurted from his mouth and nose, and then mixed with the blood of the Siren was sucked into his body through his skin again. With such a cycle of life, Bilis will not die in the process of merging due to the exhaustion of his life force.

And in the process, Grim has been silently standing on the edge of the barrel, carefully observing every step of the fusion between the two sides. With the subtle connection of the soul and the full-band perspective of the chip, Billis's body is like a transparent skin, which cannot hinder the penetration of Grim's vision at all.

Not only did he observe carefully, but from time to time, Grim took some blood specimens from the barrel and collected them. Afterwards, he can dialysis the deep mystery of the worm-mother fusion by comparing the changes in the composition of Bilis's blood.

While Grim waited anxiously, the mutant mother had burrowed her entire body into Billis's chest cavity and gnawed away his heart.

Under normal circumstances, at this moment, Bilis would already be a dead man!

After all, with the strength of a junior apprentice, it is not possible to use the power of witchcraft to support the progress of the life cycle in the body.

However, the presence of the Kraken's blood gave Billis additional vitality, allowing him to survive the absence of a heart until the mutant mother incarnated into a new heart core to take the place of the heart.

There was a splash of water.

Bilis jerked out of the Siren's blood, his hands clutching the edge of the barrel and gasping for breath.

In his round eyes, a pair of strange earthy yellow vertical pupils were impressive!

…………

Three days later.

Sabrina walked into the chamber with a large plate of bloodstained lamb ribs.

This is the second floor of the stone tower.

Except for a few would-be witches, ordinary apprentices are generally not allowed to set foot on the second floor. But this Billis, who only has the strength of a junior apprentice, not only has a residence here, but also enjoys the 'honor' of having five meals a day delivered into the house by Sabrina Quasi-Witch himself!

Such preferential treatment undoubtedly made those wizard apprentices almost crazy with jealousy.

But only Sabrina knew that the guy who locked himself in the secret room every day could no longer tell if he was the former junior apprentice Bilis!

Billis has not been out since he was ordered by Lord Grimm to move from the first floor of the stone tower to the second floor. He always hid in that airtight dark chamber, spending most of the day eating frantically.

At first, he ate fat steaks that had been carefully grilled and thickly brushed with a layer of bright fat. However, even if the two cooks sent by the lord of the castle were constantly busy, it would be difficult to supply the bottomless terror of Bilis.

Seeing that three meals a day became five meals a day, and then into a continuous eating and drinking, Sabrina was like a busy transporter, shuttling between the secret room and the kitchen with a huge food tray.

Later, Sabrina noticed that Billis didn't seem to be too picky about the palate and whether the food was fully cooked, so she took it upon herself to let the chefs skip the process of frying and frying and brushing the sauce, and simply cut the beef and sheep into the right size, grilled them and sent them in.

In the end, Sabrina even reached out of the mechanical claws hidden in her body, grabbed the bloody half-cow corpse and sent it to the secret room.

Finally, Grim couldn't take it anymore and called Sabrina over to give her a few words.

So, the next time Sabrina, who is a mechanical girl, sends into the Bilister's secret room, is a living cow!

…………

I don't know whether intentionally or not, most of the wizard apprentices in the stone tower have been dispatched.

Therefore, Sabrina, a mechanical girl, poked out four or five silver mechanical tentacles from her waist, holding a 300-kilogram bull, and easily walked into Bilis's secret room.

The Chamber of Secrets was dark and lightless.

Originally, with Sabrina's powerful mechanical eyes, she naturally had infrared vision and low-light vision, and she should be able to see through this small secret room.

But it was quite strange, the darkness in the secret room seemed to be mixed with some kind of witchcraft effect, no matter how wide her eyes were, she couldn't see through it, but she vaguely felt that there was a terrible secret lurking in the darkness.

Standing in the doorway, she did not dare to take one more step forward, but used her mechanical hand to lift the struggling bull into the darkness.

Every time at this time, she would feel a huge pulling force suddenly coming from the mechanical tentacles. If she hadn't let go of the bull in time, I'm afraid even she would have been dragged into the darkness of the secret room.

By the time she retracted the mechanical tentacles, the bull had disappeared without a trace, and the tentacles had some green, pungent mucus on the ends.

Immediately, the terrifying sound of thousands of locusts eating food sounded in the darkness of the secret room!