A masked celestial samurai in the midst of combat, unleashing a formidable strike with his mystical katana amidst foes in a somber battle. His full-body nebula armor radiates an ethereal aura, surrounded by plumes of deep obsidian smoke and sparks of dynamic color explosions. Set in the Sengoku period, the scene is elaborately detailed and hauntingly dark, with key visuals drawing from Renaissance influences. The atmosphere is illuminated by volumetric light, capturing the essence of a Greg Rutkowski and Peter Mohrbacher fusion, rendered in hyper-realistic style. An expansive ultra-wide epic shot, created in Unreal Engine 5, captures the intense, otherworldly atmosphere, ar 16:9.