(Crossover) The Fall of the Fallen God

A brain-off fantasy. I don't even know whether this is a world merger or just a chaotic crossover with no rhyme or reason. If you don't know Honkai, just treat it as the apocalypse suddenly arriving. Yep, Honkai descends like a machine god. A good way for high school seniors to unwind. Fellow fans, feel free to chat in the comments.

Bungou Stray Dogs: The Guild and the Armed Detective Agency are locked in a fierce battle, while Dazai and Dostoevsky face off from afar. Just then, a thunderous boom shakes the sky, and the silhouette of a pale, dark-haired girl gradually appears. She draws a blade of death, accompanied by a long whistle. The sea surges, bringing with it a gigantic white crab monster. People fleeing to safety scatter in panic, while hope arrives in the form of the Valkyries from the Far East Branch of Schicksal...

Conan: Kogoro Mouri wins a travel sweepstakes and takes Ran and Conan to Nagadaia, a Southeast Asian diving paradise. After hearing about it, Sonoko waves her hand and invites their acquaintances along. There, they meet the extraordinary teachers and students of St. Freya, witness the powerful mischief-making skills of a Russian orphan, and even the murder case that follows turns into a thrilling roller coaster...

A crossover with the DC and Marvel universes: Loki stands atop Stark Tower, looking down at a devastated New York and preparing to give a mocking smile, when a missile suddenly falls from the sky and smacks him in the face. A clunky mech appears, punching the crab monsters one by one. A howling white monster blindly attacks everything in sight. "Insects, your very existence is a sin!" "I declare war on you in the name of humanity!"

The Avengers don't get to do a thing...

Premise: Long live Honkai!