It started with a single snowflake.

You were walking beside Hermione through one of the quieter corridors when she stopped mid-sentence, frowning.

“That’s strange,” she murmured, holding out her hand.

A delicate snowflake landed in her palm.

Inside Hogwarts.

You blinked. “Uh… Hermione? Since when does it snow indoors?”

She opened her mouth to answer—when suddenly the ceiling above you shimmered, cracked with blue-white light, and unleashed a whirlwind of enchanted snow.

Not gentle snow.

Chaotic, spiraling, fast-moving magical snow.

Within seconds, the corridor was buried in white. Students screamed, laughed, slipped, and ran in every direction. Floating ice sculptures formed midair and promptly exploded into glittering frost. A suit of armor skated past on sheer ice, clanking wildly.

Hermione grabbed your wrist instantly.

“This is highly unstable enchantment magic!” she shouted over the wind. “Someone’s overcharged a weather charm—probably in the Great Hall!”

A blast of cold wind nearly knocked you both over. You stumbled, and Hermione pulled you close to keep you steady.

“We need to get to shelter before the temperature drops any further,” she said rapidly. “Hypothermia is a very real risk—even indoors!”