In which Byleth unintentionally saves the monastery by accepting the pope booty. And the Centurion from For Honor somehow is present, leading the Knights faction... ???

INCREDIBILIS!!

======

"Professer!" a refined voice murmurs. "I've been looking everywhere for you."

With a reserved smile the Archbishop held her honeyed tone as she sauntered towards Byleth.

Byleth turns around, expressionless as always. He stayed silent, but unfurled his arms and set aside his teacup. The corners of his lips lifted at the sight of Rhea's enticing hips.

The feminine curves captured the professor's attention and sent his blood pooling below his waist. Byleth gave in to the temptation and feasted his eyes on the Archbishop's tantalizing figure.

She led the Church of Seiros, lending her voice in praise to the Goddess. The same voice Byleth hoped would one day sing with carnal delight as he repeatedly thrusted into her verdant folds.

Rhea was without a doubt a holy woman. But beneath her flowing silks, she held a sinful body that was the fancy of many men, and women. Rhea knew very well the dominion she held, and thus her plan was born.

"Soon mother, I will see you soon,' the Archbishop yearned, keeping her thoughts veiled behind kind eyes.

Byleth returns an amicable greeting, mindful of the sudden flush within his unbeating heart.

"Rhea," he began, fondly regarding the Archbishop's graceful curves and nothing else, "is there something you need?"

She shook her head, briefly pausing to compose herself. It can be delayed no longer. "No professor, I... yes actually. There is something I need to tell you in private."

Byleth looks up, now focused on the women's eyes as he spoke. "I suppose I could offer you a moment. The Blue Lions have taken well to my guidance, I have high hopes for them in the coming mock battle."

Rhea smiled, holding out her hand for Byleth to take. "Well, I'm glad my intuition is not misplaced. The Holy Tomb will suffice, shall we?"

Byleth nodded and gently took her hand in his. "Of course," he answered as he led the way to the monastery's most sacred of places.

======

As they descended the stairs, the pair stumbled upon a scene of a commotion. Intruding upon the sacred grounds was a small gathering of soldiers, housing the colours of the Adrestian empire. They toiled at the behest of a masked figure, scouring the caskets in a bid to uncover the remains of Seiros.

Rhea stopped in her tracks, anger tainting her vision and voice. "What... what is the meaning of this? Explain this instant!" she yelled, tugging her arm away from Byleth.

"Who are you," the Professor calmly asked, walking past a fuming Archbishop.

"The Flame Emperor," the masked figure replies, its voice mechanical. "Fate is indeed a cruel mistress. Of all the people in the monastery, I have the unfortunate pleasure of being found by you two."

"Give... that back," Rhea spat, her powers alight and on the brink of lashing.

"I think not," the Flame Emperor intoned, holding the Sword of the Creator. "We shall meet again."

"Hocus pocus," its mechanical voice boomed, tapping into the ancient magics.

A surge of light weaves through the Holy Tomb, blinding both the Professor and the Archbishop. When it ended, the Flame Emperor and its entourage were nowhere to be found.

The Archbishop's plan of resurrecting her long departed mother was placed on hold as she and Byleth raced up the stairs. The Sword of the Creator was lost, and as the month of the Pegasus Moon draws to a close, the forces of Garreg Mach stood on high alert.

The Black Eagle members have long since departed in light of the revelation that Adrestian soldiers were found desecrating the Holy Tomb. The elite order of Knights under the Church of Seiros now stood alone against the unyielding tide that was the Adrestian Empire.

The knights fought valiantly, but their enemy was relentless. It seemed as though for each soldier they slew, more simply took their place. The defenses were faltering and flanks lay shattered or exposed. The Adrestian soldiers were surging into Garreg Mach by the hundreds, facing down the hopelessly outnumbered knights.

The fall of Garreg Mach was soon to come. In that moment, Rhea decided to enact her plan. Utilizing the remaining crest stones within the Holy Tomb, she combined her powers with the stones.

"Rhea!" Byleth cuts down an imperial soldier as he heard her scream.

The blood curdling tone from his crush felt like a sword was driven through his gut.

He would know because moments later, another soldier drove a sword through his stomuch. The unfeeling twat then slowly died of bloodloss rip.

His last thoughts were of Rhea, and her glorious behind. It shone with light, like it was his salvation. As if, lmao.

Little did that idiot know the light encompasing the Archbishop's figure only signaled her demise.

The light engulfs her figure, but instead of turning into an ugly dragon, she spawned a portal where she stood.

Both sides seem to pause, regarding the portal amidst the cold silence. Nobody spoke, especially not Byleth.

Breaking the peaceful respite came the sound of a horn, a deep bellowing tone that signaled only war.

A masked soldier stepped through the portal, unlike that of the Flame Emperor, now known to be Edelgard. The unknown soldier took a few steps forward before stopping, raising his short sword into the air.

"INCREDIBILIS!!!" the Centurion shouted, rushing into the fight and hacking through the Adrestian lines with his gladius and fist.

The Latin speaking maniac took down the soldiers with cruel executions, often prolonging the sufferings much to the enjoyment of an invisible audience.

More of his brethren came rushing out the portal. The Knights from For Honor were now in the fray. As a singular legion of steel, the Knights pushed back the imperials beyond the walls of Garreg Mach.

The Wardens repeatedly shoulder bashed into every soldier they sat their sights on while burly armoured Lawbringers uttered "Ad Mortem Inimicus" at every inopportune moment, with a few even proclaiming it in their dying breaths.

Soon, their chorus drowned out the sounds of even the loudest wardrums the empire could muster.

Dedue kneeled before a dying Lawbringer, his cotton-coloured hair flapping poetically in the wind.

"Ad... mortem inimicus," the knight weakly moaned.

Dedue frowned. "You will not die today, on this I swear."

"Heal!" he yelled.

Summoning his forbidden ghetto magic, he healed the knight and hoisted him back to his feet.

"Ad mortem inimicus," the Lawbringer muttered as thanks before racing off to join the fight.

"The monastery will not fall," Dedue muttered before joining the armoured knight.

"Infirmus!" the Centurion uttured for what seemed like an umpteenth time as he stepped back to beckon a now dead soldier to raise back up. "Etiam!" he hollered to the corpse.

Several Conquerors formed up beside the Centurion, ready to show the Adrestians who really were the superiors on the field of battle.

As Edelgard watched from a hill, she could only utter a simple phrase as the flail wielding Knights and Centurion charged and completely shattered her army's frontlines. "Team diff..."

Thus, the world of For Honor and Fire Emblem Three Houses were now tied.

======

Incredibilis is not a word
It is a way of life.