Harry potter: I am the king of United Kingdom

The air was heavy with the scent of aged parchment and candle wax. A young Magnus Grindelwald-Riddle, no older than six, sat cross-legged on an intricately woven rug in a grand but dimly lit study. His small hands toyed with a simple, polished wand—a gift from his grandfather, Gellert Grindelwald, who sat in an ornate chair by the fireplace.

Magnus looked up at the imposing figure before him. Gellert's sharp features, framed by his silver-blond hair, carried a certain gravity. His piercing blue eyes, shadowed by age and wisdom, seemed to bore into Magnus's soul.

"Grandfather," Magnus asked, his voice timid but curious, "why do the muggles hate witches and wizards? Why did they burn them alive?"

Gellert leaned forward, resting his elbows on his knees. His expression was contemplative, his voice low and measured. "Ah, Magnus, my boy. That is the question they want you to ask." He paused, his lips curling into a faint, bitter smile. "But it is the wrong question."

Magnus furrowed his brow. "The wrong question?"

Gellert nodded. He rose from his chair, the hem of his long robes sweeping the floor, and walked to the window overlooking the dark, snow-covered landscape of Nurmengard. "The real question, Magnus, is not why the muggles feared witches. It is why they feared witches more than the ones who burned them alive."

Magnus blinked, trying to grasp the weight of his grandfather's words. "I don't understand."

Gellert turned to face him, his gaze intense. "The muggles who lit the pyres, who sharpened the stakes, who screamed accusations in the name of their gods—they were the true monsters. But they hid behind their fear, their ignorance, and their numbers. They made the witches their scapegoats, painting them as the threat."

He knelt in front of Magnus, placing a firm hand on his shoulder. "Fear, Magnus, is a powerful weapon. They feared us because we were different. Because we had power they could never hope to achieve. And so, they tried to extinguish us. Not out of righteousness, but out of terror."

Magnus's small hands tightened around the wand as he whispered, "They were afraid of us because we were stronger."

"Precisely." Gellert's voice was calm but filled with an undercurrent of steel. "But fear is not a one-sided blade, my boy. It can be wielded by those who understand it. The world does not need to bow to fear, Magnus. It needs to bow to those who control it."

Magnus stared into his grandfather's eyes, the words sinking deep into his young mind. A part of him understood that this lesson was not just about muggles or witches—it was about power and its use.

"Remember this, Magnus," Gellert said, standing once more. "It is not enough to be powerful. You must understand why others fear that power. And then, you must decide—will you be the one who burns, or the one who lights the fire?"

Magnus's vision snapped back to the present. He stood in the shadowed ruins of the Chamber of Secrets, his breathing heavy, his body trembling from his battle with Arthur. The words of his grandfather echoed in his mind, like a drumbeat of purpose.

"Fear…" he muttered to himself, his hand tightening around his staff. "It's always about fear."

The chamber was silent, save for the faint dripping of water from the ceiling. His five-leaf grimoire hovered beside him, its dark pages fluttering ominously. The shadows around him stirred, coiling like serpents.

Arthur Pendragon had surprised him. That much was certain. But Magnus knew this was not the end. His grandfather's teachings had prepared him for setbacks, for the unexpected. Power was not measured by a single battle but by the strength to rise again.

He stepped away from the ruined throne, the shadows swallowing his retreat. His lips curled into a cold, determined smile.

"Next time, cousin," he whispered, his voice echoing in the empty chamber, "you will understand what it means to fear."

And with that, Magnus disappeared into the darkness, leaving only the faint hum of magic in his wake.

 (Author's note I don't remember who cousin is who)