Itachi Uchiha stood outside the Hogwarts castle, a gathering of curious wizards around him. They were eager to witness what the legendary ninja had to offer.

Lupin, intrigued, watched as Itachi began to illustrate the concept of the summoning jutsu. Gandora's summoning was something totally out of the ordinary.

The arcane incantation poured from Itachi's lips, his hand signs skillfully executed. Soon, the air thickened as a forboding rift opened in the sky.

A colossal black dragon, armored in ebony steel, emerged from the rift. Its colossal size casting a deep, ominous shadow over the wizards.

Gandora's red eyes glowed ominously, the sight sent a shiver down the spines of the observers. He was a fascinating creature, commanding respect and fear.

Lupin was the first to break the silence. He glanced at Itachi and blurted, "What kind of dragon is that!" drawing out a chuckle from the stoic ninja.

"This is Gandora, my summon contract," Itachi calmly explained. The notion of a contract with a creature of such magnitude was astonishing to the wizards.

"Is there an enemy, Itachi?" Gandora roared. The creature's voice echoed through the field, causing the observers to jump in surprise.

Hermione, always eager for knowledge, gasped. "It can talk!" she exclaimed, eyes wide with admiration and curiosity.

"No, I was demonstrating the summoning jutsu. Sorry, Gandora," Itachi clarified, his tone gentle. It was clear that the two shared a mutual respect.

Hagrid, who had been utterly awestruck, finally found his voice. He inquired about the glowing orbs on Gandora, his interest piqued.

Gandora obliged, giving a demonstration of his powers. Flying into the air, the dragon fired lasers from the glowing orbs on his body.

The sight was awe-inspiring, the watchers' expressions filled with respect and wonder. It seemed there was even more to the summoning jutsu than they had initially perceived.

Gandora, content at having performed sufficiently, turned to Itachi, seeking his approval. "Was that adequate?" he asked, his voice rumbling.

Itachi nodded his approval while responding, "Yes, Gandora. Thank you." The mutual respect and understanding between them was evident.

The assembly of wizards watched, amazed, as Gandora took his leave, disappearing into the rift with a wave of his tail. The sight was etched into their minds.

Itachi, now alone again, turned to face the group, "Any questions?" The group looked at each other, processing what they had just witnessed.

Lupin was the first to respond, "That was beyond anything we had assumed." The rest of the group nodded in agreement, still in awe.

Hermione, ever the inquirer, looked at Itachi, "Can anyone make a contract with such a creature?" The thought of it clearly excited her.

"The contract requires a bond of trust," Itachi shared. "The creature chooses who it wants to bond with. It's a mutual agreement."

Luna Lovegood spoke up, "Gandora feels like an old friend who's always been with us." There was genuine fondness in her voice, surprising everyone.

"Gandora is indeed old, older than many of us," Itachi responded. "I'm glad you could feel the bond we share." Itachi's pride in his summon was evident.

The sun was setting, and Itachi concluded the day's lesson. The wizards thanked him for his insights, voices filled with awe and newfound respect.

"The world of magic and ninjutsu aren't that different," Itachi mused, reflecting on the day's events. "We just have different ways of naming our powers."

Indeed, the two worlds had learned something valuable that day. In the world of magic, as in ninjutsu, respect and understanding were the keys to true power.