Create an epic scene featuring a legendary samurai from the Ryūgū era

Create an epic scene featuring a legendary samurai from the Ryūgū era, engaged in a fierce battle against demonic creatures. The samurai, clad in ornate armor inspired by deep-sea motifs, wields a glowing katana that emits ethereal blue energy. Surrounding the samurai, demonic enemies emerge from swirling dark mists, their fiery eyes and sharp claws adding to the intensity of the fight. Incorporate dynamic FX elements like sparks flying from clashing swords, ghostly apparitions, and a powerful shockwave emanating from the samurai's strikes. The background should feature an ancient, mystical battlefield with glowing runes and a stormy sky illuminated by lightning, enhancing the otherworldly atmosphere