Nathaniel, a young man who accidentally travels to the world of Harry Potter, has his fate changed forever. Bound to the Merlin template from the start, he instantly possesses the incredible ability to automatically understand ancient runes and cast spells without a wand.

In Diagon Alley, he experienced a surprising encounter and made a close friend aboard the Hogwarts Express. His initial confrontation after the Sorting ceremony made him stand out, and his impressive performance in Charms captured everyone's attention. Spending time with Hermione in the library, their relationship blossomed. He deftly resolved the Halloween troll incident and the controversial Quidditch match with his ability to masterfully manipulate the situation.

As his adventure unfolds, he acquires the "Grand Master of Alchemy" sub-template, unlocking the "Natural Affinity" trait, allowing him to communicate with magical creatures. After fusing with the Gandalf template, his light magic is amplified, and his strength soars. Facing the Azkaban escapee, the conspiracy of the Triwizard Tournament, and the Horcrux crisis, he never flinched.

He led the charge in the Battle for the Hall of Prophecy and the Defence of Hogwarts. Through constant battle and exploration, he awakened his divine seed and obtained the "Time Traveller" template. He pursued the Deathly Hallows, participated in Dumbledore's plan to fake his own death, and constructed the prototype of his godhood, completing the framework of his kingdom until he ignited the divine fire.

In the end, the war between gods and demons broke out, and he started a duel with the Dark Lord at the level of laws. The two gods resonated and awakened, rewriting the origin of magic, successfully opening up a new era of gods, and becoming an immortal legend in the magical world.

The canonical version awakens as a vampire in "Highschool of the Dead." In "Parasyte," he fuses with Parasyte. In "Kabaneri of the Iron Fortress," he devours Kabane. In "Jiojio's Bizarre Adventure," he becomes the ultimate perfect creature. In "Akame ga Kill," he becomes a super-dangerous creature at the top of the food chain. In "Fate," he becomes the immortal evil of humanity, living from BC to the present day. In "One Punch Man," he becomes the God of Monsters and fights with the Bald Man in the Cape from Earth to Mars. —The devilish version of Saya Takagi: "Scum, devil, shameless, die!" Joseph Joestar (jiojio): "I treated you as a friend, but behind my back you want to be my dad!?" Tohsaka Rin: "What is your relationship with my mom?!" Illya: "Dad, after this Holy Grail War is over, let's go flower viewing together."