With some help!

Kiba and Freed charged at each other, and their blades clashed. To Freed's shock, Kiba's sword didn't even crack. "The fuck!? This is three Excaliburs! Your weak shit shouldn't stand a chance!" he cursed, swinging again, this time going faster, and forcing Kiba to duck instead of blade clashing again.

"Ack! His speed went up! How?" Kiba demanded, barely dodging Freed's rapid swings, before Irina jumped in, wrapping Freed's Excalibur with the malleable blade up her own Excalibur Mimic.

"That's the ability of Excalibur Rapidly!" she explained. "Given that was one of the stolen swords, it makes sense! We have to break his blade!"

Freed cursed and wrenched his own blade free of Irina's, Excalibur becoming invisible as he swung again, but Kiba was still able to block by sensing Freed's bloodlust. "We have to break his Excalibur!" Xenovia shouted, extending her empty hand, magic circulating around it.

"Sure that's okay?" Kiba asked as he clashed blades again, Freed breaking away to avoid Irina moving in from the side.

"It's fine!" Irina shouted as her Excalibur Mimic lashed out like a sharp whip, putting Freed on the back foot. "So long as the cores remain intact, they can be remade with alchemy!"

"Works for me!" Kiba grinned, jumping back into the fray. Issei, having been Boosting himself and the others discreetly the whole time, looked up towards Kokabiel, nervous that he might try to act, but fortunately, the Grigori seemed content to simply enjoy the show.

The magic around Xenovia's hand formed into a spell circle before it. "Peter, Basil, Dionysus, and finally, the Virgin Mary..." she intoned, the hilt of a large blade emerging from the circle. She grabbed it. "Lend thine ears to my humble request." She then pulled the massive blade out, effortlessly wielding it along with Excalibur. "In the names of the Saints who dwell within this blade, I wield it! Durandal!"

Valper's eyes widened. "Impossible! Not even my research was able to create an artificial wielder of that blade!" he stammered.

"When did we ever say we were artificial? Others were blessed and granted your so called research to wield lesser Holy Blades, seeing as the damage was done, might as well use the meager benefits, but Xenovia and I? Au naturele!" Irina stuck her tongue out at the human garbage in question, before returning her attention to Freed.

"You shitty bitches! I amd the greatest swordsman!" Freed shouted angrily as he kept swinging frantically, barely holding off and avoiding Xenovia and Irina. "Damn it, why can't I hit you!?" he demanded.

Kiba charged in, and slashed. Off balance, Freed tried to counter, swinging his own blade at Kiba... Only for it to shatter against Kiba's Balance Breaker, the blade slashing Freed deeply across his torso. He went down, ****. "See that? Our combined power defeated you," Kiba stated, before turning towards Valper. "You're next," he stated.

"Inconceivable... How can a Holy Devil Sword even exist? Such diametrically opposed forces are impossible," Valper grit out. "The system maintained by God could never allow such a thing..." His eyes widened in sudden realization, and he began laughing like a madman. Which honestly fit, given he was one. "Hahahaha! I see! I see! So this is what happens when the balance between Good and Evil is shattered! It wasn't just the fourth Devil King, but God himself was-!" he started to rant... Before he was cut off by a Light Javelin impaling him from behind. He was dead before he hit the ground.

Everyone's gazes snapped up to Kokabiel, who was the culprit, and he looked rather amused. "You were an impressive man, Valper. No, beyond impressive, able to figure it out at the end. But you outlived your usefulness," he remarked to the corpse. He then slowly turned towards the others, Issei stiffening in the middle of giving Sona a boost. "Now then... Let's end this!" he cackled madly.