Invicinble Colorless Butler

As the smoke and dust began to dissipate, a figure appeared wearing a cloak and mask to cover himself. That person is Ziel who broke the mithril door earlier.

"Who are you!? How did you get in here!?" Gilbert shouts at Ziel and taking out a magic wand from his space storage and preparing to attack. Tristan on the other hand is already holding a greatsword in his hand.

"You don't need to know who I am. And like I said before, I'm here to eradicate pests." After saying that, Ziel disappeared from where he was.

"Be careful!" Caldeon shouted warning Gilbert and Tristan, but the words were too late.

Ziel suddenly appeared in front of Gilbert and Tristan, In his right and left hands, Ziel held Tristan and Gilbert's faces and slammed them to the ground.

Boooooooommmmmm....

The room shook and a small crater was created on the ground where their heads were banged. But Ziel's attack didn't end there. He threw their bodies in the air, picked up Tristan's greatsword that was lying on the ground then Ziel compressed his aura into the sword and used it to slash their necks at once.

Sword King and Magic King, two existences that could be said to be very powerful in the Clorius continent just died in a matter of seconds. They didn't even have time to make a single counterattack on Ziel.

"Bastard!!" Caldeon who saw his two strongest men killed instantly before his eyes, charged forward furiously at Ziel. The black smoke that enveloped his body gathered in his hands and condensed into a large black sword. He then swung the sword at Ziel.

"Heeh... Isn't that an evil spirit? So you're using yourself as an evil spirit's host? Poor... Even though I can't feel sorry for you." Ziel then parried the black sword with Tristan's greatsword which he was currently holding. The resulting shockwave shattered the floor, pillars, and even Caldeon's throne.

"Shut up!!" Caldeon raised his sword and mana as well as his life force was sucked into the sword which made his sword aura thicker. He swung his sword at Ziel.

[Devil's Wrath]

The sword flash of mana compression goes straight to Ziel with high speed. Seeing that, Ziel did the same with Caldeon, he raised his sword which currently had a thick gray aura, and swung it at Caldeon. Their sword slashes collided. What happened next was not a shockwave from the clash of swords. But Ziel's slashes cut through Caldeon's slash in an instant.

"What!?" Caldeon was dumbfounded to see his slash with the combined power of the evil spirit and himself being cut off as if it was nothing. Ziel's slashes shot straight at Caldeon with incredible speed. Caldeon who saw it tried to dodge, but his response was a bit slow and Ziel's slash cut his right hand that holds the sword.

"Aaaaaaahhhhhhhhhhhhhhhhhhhhhhhh..." He screamed in pain while clutching the slash wound on his shoulder.

"That was close, even though I wanted to eliminate you with one hit." Ziel sighed while shaking his head.

The thing he did earlier was the same thing Caldeon did. Ziel compressed his aura and mana to the extreme into the greatsword he was holding. The difference was that he compressed it many times over until it was as sharp as possible to the maximum extent his sword could receive his mana and aura. Because of that, the sword he was holding at the moment even though it belonged to the Legendary Rank but felt very hot, and small cracks formed on the blade. That was because the blade couldn't accommodate the excessive compression of aura and mana.

Caldeon whose hand was cut off tried to strike back. 8 magic circles appeared on his body then he extended his hand towards Ziel. A large magic circle was created in his palm.

[Fire Bolt]

A ball of fire mixed with lightning shot out from the magic circle in Chaldeon's palm towards Ziel at high speed.

Ziel who saw that charged towards the ball of lightning fire and easily slashed it with the sword he had filled with compressed mana and aura.

"What!?" Caldeon who saw it was shocked and wanted to launch his next attack. But Ziel was already in front of him and punched his face with his free hand. Caldeon bounced up to the cave wall. There is a big crack in the wall from the impact with him.

"Bastard! You will pay for this! I will kill you!" Caldeon screamed hysterically, then a magic circle formed on the part of the severed hand and stopped the bleeding. From the previous exchange, he realized that the person in front of him had power far above him. But anger had already taken over him because 2 of his subordinates died and his hand was cut off. He wakes up and prepares to attack Ziel again. But suddenly he stopped in his tracks...

(Be one with me, I'll give you the strength you need)

A voice echoed inside Caldeon's head. The sound came from the black sword still held in his severed hand.

"Is what you said true!?" Caldeon became excited after hearing what the evil spirit said.

(Of course, I will give you great power)

"Can I kill him with that power!?" He's getting more and more impatient to kill Ziel.

(You can, you can even rule this continent)

"Then give it that power right now!" Caldeon shouted impatiently.

(Hahaha... Alright. Accept this power of mine. Let my power seep into you)

"I understand!" After that, the black sword turned back into black smoke. The smoke then enveloped the Caldeon's entire body and began to enter through the pores of his skin.

"Aaaahhhh... What happened!? Why does it hurt so much!?" Caldeon knelt in pain while holding his head.

Ziel just silently watched the drama between the evil spirit and Caldeon. From the start, he could hear the conversation between the evil spirit and Caldeon even though it was inside Caldeon's head. Because Ziel can catch the sound waves that the evil spirit transmits into Caldeon's head.

Even though Ziel knows that Caldeon and the evil spirit will become one to defeat him. But Ziel remained silent because he wanted to see what kind of transformation would occur when Caldeon and the evil spirit merged into one.

Caldeon's skin color began to turn jet black. A horn appears on the right side of his forehead. His eyes turned white. The hand that had been severed before grew back and the black smoke that previously only partially covered his body, now completely covered his body. He was like an incarnation of a demon formed from a mass of smoke.

"No!? What are you doing!? Why did I turn into this!?" Caldeon panicked when he saw his body turning into a monster.

(Hehe... Don't you want power? Then hand over your body. I'll help you kill him)

Evil spirit and Caldeon spoke alternately using one body. He's like a person with multiple personalities. Looks strange either from appearance or personality is seen from any angle.

"No!? I won't give my body to you!? Get out of my body right now!?" Caldeon started to roll around while banging his head on the floor trying to expel the evil spirit.

(It's useless, now I'm completely one with you. As a thank you, I'll help you kill him. So... Goodbye. Hahaha...)

"No! No! Aaaahhhh..!!"

After their long debate, Caldeon's body suddenly fell silent. But not long after that, a tremendous aura emanated from within his body. He got up from where he was rolling before. 9 magic circles appeared from his body. Right now the 'Caldeon' had the power of a Demigod.

"Hahaha... I finally have my own body. Thanks to you for pushing him like that. Otherwise, I'll have a hard time mastering him. As a reward, I'll give you the honor of being my first victim. I'll suck your life force out." The evil spirit inside Caldeon's body laughed and glared at Ziel. He had already set Ziel as his prey.

"Are you guys done?" Ziel just looked at him indifferently.

"A mere human but you are so arrogant. It seems that you are not aware of your current situation. Then I'll torture you first before sucking you until dry!" From the evil spirit's hand emerged a black magic wand with a red crystal on it. Because Caldeon was a sage so he had a wand with him.

[Skull King]

A large magic circle formed on the ground. A creature with a crown and red eyes tried to get out from the center of the magic circle. When the creature shows its true form. A giant skeleton 3 meters tall and wielding an ax appeared in front of Ziel.

Gruaaaaaaahhhhhhhh...

The sound of his roar echoed throughout the cave area.

"Hahaha... Now Skull King, defeat him but don't let him die!" The Skull King immediately moved forward to attack Ziel with incredible speed.

"Hmm... Maybe it'll take a little longer than I thought." Ziel muttered softly and stared at the Skull King who came to him.