What If the Four Horsemen Entered the Demon Slayer Universe?

The apocalypse doesn't knock. War, Death, Fury, and Strife tear a hole into Taisho-era Japan — a world already crawling with demons and the sword-bearers who hunt them. But the Nephilim answer to no Hashira, no Breathing Style, and no Demon King. When the Riders of the End arrive, the question isn't who wins the war between slayers and demons. It's whether anything survives the ones who came to end them both. Four riders. One hunt. And a whole world caught in the middle. ▶ Watch to the end — the collision no one walks away from clean. 🔔 Subscribe to Crossovers Untold for more impossible matchups and "What If" crossover stories. 💬 Who would YOU add to the hunt? Drop it in the comments.