"Ice Devil's Rage!!!!!!"
Kyoya, after inhaling, releases a large purple blizzard of cold air, ice and snow from his mouth, directing it towards Dante. Upon contact, Dante was inflicted with a great amount of damage as he was sent flying back.
"This magic......it can damage me to this much degree. This ice mage is definitely arcane stage. He doesn't seem to posses a devil, yet he has the power and appearance of one right now."
"ARRRRGGGGGGGGGGGHHHHH!!!!"
With a loud roar, Asta launched multiple slashes of Anti-Magic at Dante. While Dante was swiftly dodging Asta's attacks in the air, a sigh escaped his lips.
"I was hoping to get your story, but it seems you're on a rampage and now isn't the time. Who is that devil, Lucifero?"
"Ice-Make:Gáe Bolg!!!!!!"
While Dante was communicating with the devil he's contracted to, Kyoya made a long spear out of ice from his Ice-Make magic. As he jumped in the air, he channels his Ice Devil Slayer Magic through the spear and throws the weapon at Dante with all his might.
"Foolish."
Dante used his gravity magic to force the spear to crash into the ground. When it did, the result was an enormous explosion and a giant glacier forming from the ice magic. Soon Asta flew towards Dante and swung his blade. While Dante was dodging, he was listening to Lucifero.
"I don't know. If there was a high ranking devil in this world, it would be Zagred, who left the underworld and got killed by a mere human. With a stopgap power like erasing spells....it's probably a low ranking devil. But that ice mage, I sense a sinister presence in his grimoire yet it's not one of my kind."
"So in other words, the true threat isn't the devil possessed boy but the ice mage."
As Dante smiled, he used his gravity magic to pull several large rocks from the ground and launched them at the two boys. As Asta sliced them apart with his sword, Kyoya used the destroyed rocks as a platform as he got close to Dante.
"Ice-Make:Silver!!!!!!!"
After boosting his Ice-Make magic with his Devil Slayer Magic, Kyoya gestures his right hand and instantly freezes Dante along with the humongous area in front of him.
When this happened, Asta shatters the ice with his sword and slashed Dante's face. As this happened, Dante looked towards the two mages.
"How dare you mark me? I didn't want to dirty my hands for vulgar brats like you....but it can't be helped. Gravity Magic:Heavy Infight."
With his grimoire opened, Dante moves in close to Asta and rapidly punches him. By manipulating gravity, Dante increased the weight and speed of his punches and easily overwhelmed Asta as the boy was crashing into the ground.
"Ice Devil's Zeroth Destruction Fist!!!!!"
As Kyoya produced the same type of ice that he devoured from Invel, he creates a pair of destructively powerful gauntlets with the same properties as the aforementioned ice, and used them to brutalize Dante in a flurry of punches.
Seeing this, Dante returned the favor by using the same spell he just used on Asta. As Kyoya's fist clashed with Dante's, Kyoya felt as if his hands were going to be crushed. Meanwhile, Dante saw that his fists were rapidly getting frozen in ice.
"Amazing!!!! Your rage, malice, and hatred is so raw and unfiltered!!!!"
"Ice Devil's Zeroth Long Sword!!!!!!"
Kyoya creates an ethereal long sword from his palms that he uses to slash at Dante, inflicting a deep cut into the member of the Dark Triad and freezing him solid. As Dante breaks free from the ice, he saw the look of hatred Kyoya had in his eyes. He could tell that the boy hates devils more than anyone else.
However, he soon felt an ominous mana escaping from the boy as his grimoire was glowing with black magic energy. Seeing this, Lucifero was in shock as a black mist escapes from Kyoya.
"He's a descendant and he holds the soul of that man in his grimoire. The first human to travel to the underworld....he's related Zeref!!!!"
"RAAAAAAGGGGGHHHHH!!!!!!!"
With a loud roar, Kyoya's magic power rose drastically. However, the more he did this, the more he felt as if he was drowning. Drowning in a dark abyss known as his mind. His rage, his hatred, all of it was slowly consuming his being. Seeing this, Dante couldn't help but smile in amusement.
"That anger....that hatred.....that ominous mana...YOU TRULY ARE A HUMAN!!!!! WHAT IS YOUR NAME?!"
"DROP DEAD!!!!!!!!!!!"
After first crafting a bow from ice, Kyoya forms multiple arrows from both hands and fires them at high speeds towards Dante. Seeing this, the man smiled in delight as he saw Kyoya's rage continuing to grow.
"Gravity Magic:Presence of the Demon King."
With his grimoire opened, Dante dramatically increases the strength of gravity in the area in front of him. Soon the arrows that were aimed at him were slammed into the ground. As this happened, Kyoya got behind Dante while the man was distracted. Soon Kyoya heard the voice in his head say one thing.
"Kill him."
As Kyoya heard this, he held his left arm in the air as it was the left half of his body that was part devil at the moment. With remarkable speed, Kyoya shapes and molds the ice from his Devil Slayer Magic into the shape of an axe sword.
"Upper arm, collarbone, windpipe, temple, diaphragm, ribs, testicles, and thighs. I have my targets set. My mind is filled with malice....in this moment...i'm not a magic knight....this rage that consumes me, my hatred for the devil before me. In this moment, i'm a devil slayer!!!!"
"More....more....i'll draw out more of this power.....and TEAR HIM TO SHREDS!!!!!"
As Kyoya held the axe sword in one arm, he tries to force more of the demonic properties of his devil slayer magic onto himself. As this happened, blood escaped from his left eye. Soon Dante felt a strong amount of mana behind him. As he turned around, he drastically increased gravity as Kyoya's body was slammed onto the ground.
"Well, this was certainly fun. But if Lucifero is correct about who you are, then things might get interesting. I'll be taking you back to the Spade Kingdom with me. Can't have someone capable of killing E.N.D roaming free while he's on a rampa-"
Before Dante could finish his sentence, a giant slash lands on the ground. This caused Dante to stay away from Kyoya. As Dante looked forward, he saw a man holding his sword as a spatial magic portal was behind him.
"Hey. Don't you lay a hand on my squad."