The confrontation that would shake the entire wizarding world had reached its decisive moment.
Throughout Hogsmeade village, wizards who had been casually browsing shop displays gradually emerged from doorways and windows, drawn by the unmistakable magical disturbance. They looked toward distant Hogwarts, where tremendous bolts of blue and purple magical energy were locked in fierce, sustained combat.
As more wizards continuously Apparated into the village—summoned by rumor and sensing the conflict through the ambient magic—they immediately detected the two terrifyingly powerful forces clashing above the castle.
Lucius Malfoy and several patriarchs of prominent pure-blood families had arrived in Hogsmeade as well, responding to emergency alerts. Standing on various rooftops for better vantage points, they watched the distant castle with a mixture of awe and concern.
"Has an enemy force actually invaded Hogwarts?" one family head asked with genuine alarm.
Lucius shook his head decisively. "How could that possibly be? Who in their right mind would dare invade Hogwarts at this particular moment? With Erwin Cavendish, Albus Dumbledore, and Gellert Grindelwald—arguably the three most powerful wizards of their respective eras—all present simultaneously?"
"Then what exactly is happening up there?" the other patriarch pressed urgently.
Lucius paused, studying the distinctive magical signatures, then gestured toward the battlefield with knowing certainty. "I believe we're witnessing a duel between Erwin and Grindelwald. Purple and blue are their unmistakable signature colors."
Throughout the wizarding world, truly powerful practitioners often manifested distinct, consistent colorations in their magical expressions. This wasn't a conscious aesthetic choice, but rather an innate reflection of their fundamental magical essence and character.
For instance, Dumbledore's magic consistently flared with gold-red brilliance, while Voldemort's dark power manifested as an eerie bluish-black. Regardless of which specific spell they cast, their inherent "color" remained constant and recognizable.
Blue light was universally recognized as Grindelwald's distinctive mark throughout Europe. Purple belonged unmistakably to Erwin Cavendish.
The assembled family heads nodded slowly, accepting Lucius's expert assessment of the situation.
Meanwhile, inside Hogwarts' grounds, Erwin and Grindelwald had built their respective magical auras to an absolute crescendo of power.
The next moment, without theatrical preamble or dramatic pronouncements, they simply raised their wands in perfect synchronization and cast simultaneously with devastating force.
The spells themselves were technically basic—fundamental combat hexes taught to third-year students—but when amplified by their full, unrestricted power, the effect was absolutely apocalyptic.
Where an ordinary wizard's casting might produce a thin beam of colored light, these manifestations were massive pillars of raw magical energy. A towering violet column and an equally massive blue pillar collided violently in mid-air between the combatants.
There was no earth-shattering roar or blinding explosion as one might expect from such a collision.
Instead, the opposing beams of power seemed to merge at their contact point, creating a silent, terrifying convergence that was somehow more unsettling than any explosive force could have been.
Only those observers with sufficient magical perception and training could sense the deeper truth: at that precise point of apparent calm, a vicious, brutal battle was raging between their raw magical essences themselves.
The opposing forces were locked in sustained mutual attrition, each constantly gaining and losing microscopic ground in an impossibly complex struggle, making it utterly impossible to determine any clear victor in the short term.
Both Erwin and Grindelwald continued relentlessly pushing more power through their wands, their vast magical reserves flowing freely from their cores, draining with alarming rapidity.
Erwin's face gradually grew pale and drawn. His personal magical reserves had been completely exhausted already.
Without breaking his concentration, he activated his carefully prepared backup magical sources—stored energy from various enchanted items and prepared reservoirs—forcing the flow to continue uninterrupted.
Grindelwald felt the sudden surge of renewed power from his opponent and experienced genuine shock.
He genuinely hadn't expected Erwin's effective magical reserves to be quite so vast, nor that the young wizard could sustain combat at this intensity for such an extended period on equal footing with a legendary duelist.
Carefully assessing the developing stalemate, Grindelwald made a strategic decision against continuing a pure war of magical attrition.
Since he apparently couldn't overwhelm Erwin through sheer quantity of available power, he would instead rely on the demonstrably superior quality and refinement of his magic—honed through decades of the most intense combat experience imaginable.
Coincidentally, Erwin reached precisely the same tactical conclusion at almost the same moment.
Through the sustained clash of their powers, Erwin had realized something genuinely profound about his opponent's capabilities: Grindelwald was indeed measurably stronger than Dumbledore in certain fundamental respects.
Considering raw magical power and combat efficiency alone, Grindelwald had arguably surpassed even the legendary Headmaster's capabilities at his peak.
As Lady Ravenclaw had astutely observed previously, Grindelwald possessed essentially everything except divine power itself. If he somehow managed to master that final element, he would genuinely reach the operational level of the Four Founders themselves.
Erwin suspected Dumbledore likely possessed similar fundamental potential, but the Headmaster's extensive political maneuvering and administrative responsibilities over recent decades had inevitably slowed his personal magical growth compared to Grindelwald's pure, single-minded focus on combat mastery during his long imprisonment.
Alternatively, perhaps Grindelwald simply possessed naturally higher innate talent for pure magical combat.
Regardless of the underlying reasons, Erwin recognized that continuing this stalemate was ultimately pointless and strategically wasteful.
It was time for a genuinely decisive blow to end this demonstration.
Both combatants reached the identical resolve simultaneously, as though reading each other's tactical minds.
They released low, primal shouts of exertion, channeling absolutely the last reserves of their available strength into one final push.
The massive pillars of opposing light compressed dramatically, transforming from broad columns into impossibly concentrated rays of blinding, laser-like intensity.
The refined rays collided with catastrophic force.
From the precise impact point, a flash of pure white light erupted with such overwhelming brilliance that all onlookers—and even the combatants themselves—were forced to squeeze their eyes shut against the searing radiance.
By the time the blinding light finally faded enough for normal vision to return, the battle was definitively over.
Inside the castle, a wisp of distinctive purple smoke coalesced rapidly into Charlotte's solid form. She caught Erwin smoothly as he fell from magical exhaustion, supporting his weight effortlessly.
She offered a brief, respectful bow toward the assembled professors observing from the castle windows, then whisked her lord away with swift Apparition before anyone could approach with questions.
Grindelwald, meanwhile, touched down on the castle grounds with considerably less grace, staggering slightly as his legs absorbed the impact.
Dumbledore instinctively moved forward to offer physical support, but Grindelwald shook his head firmly, declining the assistance with stubborn pride.
He stared intensely in the direction where Erwin and Charlotte had vanished, his eyes wide with genuine astonishment and something approaching disbelief.
The situation was simply extraordinary, verging on impossible. How had a wizard of Erwin's relative youth possibly amassed such genuinely formidable magical strength?
Summoning the absolute last dregs of his depleted magical reserves with visible effort, Grindelwald Apparated directly back to his private office rather than enduring the walk.
The castle's open grounds were left suddenly empty of the principal combatants.
The assembled students, thoroughly confused by the abrupt conclusion, whispered urgently amongst themselves trying to determine what had actually happened.
Most importantly—who had actually won the legendary duel?
Dumbledore stepped forward decisively, his amplified voice cutting cleanly through the rising murmurs and speculation.
"Back to your classes, everyone! Your scheduled lessons aren't finished yet. We can discuss today's extraordinary events later during appropriate times."
The various professors began efficiently shepherding their students back toward the castle proper, though the young wizards' minds were clearly occupied entirely elsewhere rather than on their remaining coursework.
The ultimate outcome of the historic duel remained an absolute mystery—likely known only to those few individuals who, like Dumbledore himself, had witnessed the instantaneous conclusion with sufficient magical perception to understand what had actually transpired in that final moment.
In the Slytherin tower dormitory, Erwin sat carefully on the edge of his bed, both hands wrapped around a large magical energy crystal. He focused intently on drawing its stored power directly into his depleted reserves, his dangerously pale complexion very slowly beginning to regain some healthy color.
Charlotte stood silently nearby, maintaining her vigil without disturbing his recovery process.
Finally, after nearly an hour of sustained absorption, Erwin tossed the now-completely dull and lifeless crystal aside with a soft clatter.
"As expected of Grindelwald's legendary reputation," he muttered with genuine respect. "The sheer quality and refinement of his magic is absolutely extraordinary—perhaps unmatched among living wizards."
Charlotte stepped closer, her expression clearly worried despite her professional composure. "My lord, between you and Lord Grindelwald... who truly prevailed in that final exchange?"
Erwin hesitated, considering his response carefully, then released a dry, somewhat bitter chuckle.
"I suppose, technically speaking, I lost the pure duel. In that final exchange of maximum power, I genuinely wasn't holding anything back in reserve. But I distinctly sensed that he still retained sufficient presence of mind and residual power to cast one additional spell if he'd chosen to do so. Had he selected the Killing Curse for that final strike, I would almost certainly have died."
Charlotte nodded grimly, her jaw tightening at the confirmation of how close they'd come to disaster.
Meanwhile, in the Defense Against the Dark Arts professor's office, an almost mirror image of that exact conversation was simultaneously taking place between Grindelwald and Dumbledore.