Hogwarts: Sign In for a Thunderbird, and Snape Loses It

In 1980, Eric Longbottom transmigrates and becomes Neville Longbottom's biological older brother.

Their parents have yet to lose their minds, but the shadow of the Dark Lord looms over them.

Fortunately, he binds himself to a god-tier sign-in System and gets the bloodline of an ancient thunderbird from the start, gaining control over the thunder of judgment!

Who says the Longbottom family produces Squibs? I'll personally train Neville, have him wreathed in lightning, punch Malfoy, and kick Death Eaters! The family is in decline?

I'll monopolize the Knockturn Alley black market, wield a Gringotts black card, and buy half the Wizarding World, making the Pure-blood families line up to grovel at my feet!

Snape: "After reading his Potions paper, I feel like I'm the apprentice."

McGonagall: "He crushed a Bludger with his bare hands? Is this really just a first-year student?"

Dumbledore: "The alchemical trinket he casually whipped up is actually as powerful as a Deathly Hallow!"

Voldemort: "Don't call me the Dark Lord. Before Eric Longbottom's Thunder Prison, I'm just someone playing with fire!"

With thunder in hand, I'll become a god through alchemy. In this life, I'll be the one to set the rules of the Wizarding World!

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.