Supreme Across the Multiverse, Starting with a Ghost Curse

[Multiverse Crossover] + [Semi-Invincible Flow] + [System] + [Epic Battles]

Arcs Completed: Demon Slayer, Jujutsu Kaisen, Fate: Holy Grail War, One Piece, Bleach, One Punch Man, Naruto, Hunter x Hunter.

Flaming Blade of the Flame Hashira + Black Flash + Armament Haki + Ryūjin Jakka = ?

"That sword style should have been lost to history!!" — Muzan snarled in fear.

"Kamiya Seiichi… you're terrifyingly strong! Are they serious?! Gojo Satoru is the strongest in the modern era?" — Sukuna laughed hysterically.

"Rin, the Sword Saint Kamiya Seiichi is the mightiest Servant! Summon him and we shall win for sure!" — Tohsaka Tokiomi declared resolutely.

"He is the final destination of the sword in this world." — Dracule Mihawk muttered, watching Zoro step up to challenge.

"Eh?! This has to be a joke, right?!" — Kyoraku Shunsui whispered, sweat sliding down his cheek, staring silently at the two blazing Ryūjin Jakka blades.

Sword Saint. God of Cursed Techniques. Strongest Grand Servant. The Pirate Era’s Ender…

Kamiya Seiichi: "All of my strength comes from my own hard work, the system… and transmigration!"