Rias frowned as she sent a sphere from her Power of Destruction towards one of the Cerberus's, seeing the incoming attack the three headed dog tried to dodge to the side, only to see water appear from nowhere and restrain it in place. The creature bellowed in agony as it was hit by the power before dissolving into nothingness. Rias looked over to Sona and gave her friend a grateful nod of thanks before the duo turned to see the last Cerberus being taken down by the other members of their respective peerages.
Saji was absorbing its strength through his Sacred Gear as Absorption Line wrapped itself around one of the dog's heads, meanwhile Koneko and Tsubasa used their Rook strength to pin it in place. Both peerages using group tactics to safely attack the Cerberus, as if they were a pack of wolves hunting a larger prey. The Cerberus gave one last howl of defiance before it grew quiet as the sword that Kiba had made for Irina changed shape and shot forward, piercing the dog's three heads and braining the helpless beast.
Seeing the last Cerberus dealt with, Rias and the rest of them turned their attention to the fight between Arthur and the others, flinching as they saw the heavily panting and injured Kiba and Xenovia staring at the unharmed descendant. The descendant sighed in exasperation as he raised Excalibur above his head and a circle of black flames briefly surrounded the descendant before dark twisted Holy energies began condensing around the tip of the blade.
All the fighters watched as a Tsubaki placed herself between the approaching onslaught of flames before a large full body mirror appeared in front of her. "Everyone get away from him!" shouted the Queen, making Xenovia and Kiba glance at her and immediately back away from the descendant.
No one said anything as the black tide crashed into the mirror before being absorbed into the Sacred Gear, suddenly the mirror glowed before the black flames shot back out of it at Arthur with ten times the power it had originally. Arthur's eyes widened as he saw this before the descendant was engulfed in his own black flames, as the attack died down everyone saw where Arthur had been standing was reduced to a smoking crater.
"We got him!" cheered Irina, even as Le Fay had a horrified expression on her face.
Suddenly they saw a portal form in front of them and a sinking feeling grew in the combatants as a familiar figure emerged from within it, clutching Caliburn in one hand and Excalibur in the other.
However, Le Fay frowned as she noticed something wrong with Caliburn…it was weak…
To the Devils and exorcists who hadn't been around that blade a full power it would have seemed powerful but Le Fay knew the truth. Caliburn was barely even at half its power as its weak glow was outcompeted by the black light of Excalibur. 'What is going on? Caliburn never acted like that before,' she thought.
"That's not good," muttered Rias as they saw their opponent completely unscathed from the attack. "Tsubaki I don't suppose you could do that again?"
The Sitri Queen shook her head, "Alice Mirror can only be used once before it has to enter a cooldown period."
"Then we're back to the old fashion way," growled Xenovia as the two exorcists as well as the Devils all surrounded Arthur.
Suddenly the sword in Irina's hand shot towards Arthur as the exorcist maneuvered herself into his blind spot, only to see Arthur move at an unnatural speed as he just barely avoided being skewed. However, he didn't escape unscathed as the blade still narrowly cut the hand holding Caliburn, causing the sword to fall from his grasp and sink into the earth.
Satisfied that they had separated him from one of his weapons they all prepared to attack at once, realizing this Arthur gave a low growl of annoyance. "You're in my way, Sword of Promised Victory…" he spoke, softly as he raised Excalibur above his head and all they saw was a pulse of black before pain consumed them.
Kiba Yuuto wasn't quite sure what had just happened, it had seemed like they had forced Arthur into a corner, only for the twisted power of Excalibur to suddenly engulf them before the Devil felt pain across his entire body. Pushing himself to his feet Kiba noticed that he was the only one left awake from the blow as Arthur slowly strode towards Le Fay's unconscious body.
Before he even knew what was happening Kiba felt his body rushing towards Arthur, Holy Eraser clutched tightly in his hand as he attacked the descendant, rage acting as the only driving force to move his body. The descendant lazily blocked the attack as Kiba placed himself between Le Fay and Arthur, getting a frown from the descendant.
"Move Devil, I went easy on you before but if you get in the way of my revenge I'll kill you too," ordered Arthur, getting a soft chuckle from Kiba.
"Don't get me wrong, I hate her just as much as you…but Issei wants her alive and I owe him my life. So I can't let you kill her…besides how can I pass up the chance to kill Arthur Pendragon himself?" grinned Kiba as he met Arthur's stare with one of his own.
"That look in your eyes, they remind me of his," glared Arthur as he raised Excalibur for a finishing blow…that never came.
Kiba blinked as he saw the masked knight standing before him and blocking the blow that would have decapitated the Devil. "You," hissed Arthur, fury clearly displayed on his face.
"Hello, Poser," growled the knight in a genderless voice. "I heard you wanted to see me. Are you ready to remake the Battle of Camlann?"
Kiba was shocked as he stared at the armoured knight before him, feeling like he had seen the armour and sword before but unable to recall where. Suddenly Arthur retreated back from the interlocking blades as he examined the opponent before him.
"Mordred," growled the descendant.
'Mordred!?" exclaimed Kiba, before erupting into a coughing fit as the rest of the observers began coming to their senses, a soft gasp heard from Le Fay at the sight.
"By the authority of the King I command you to be still," growled Arthur as Excalibur pulsed with a black glow.
"These aren't the droids you're looking for," replied Mordred in an amused tone as the knight did a familiar hand wave and started walking over to him.
The descendant just growled before he tried again with a similar result as Mordred feinted an overhead strike and instead head butted Arthur with her helmeted head. The descendant backed up before he looked at something behind her and Excalibur gave another pulse of black energy.
"By the authority of the King I command you..." begun Arthur, getting a disappointed shake of the head from Mordred.
"Again, Poser? You should know by now that doesn't work on me," muttered the knight.