A painting of a man with a sword in front of a fire

Imagine a scene with a ninja dressed in all-black attire, holding a gleaming sword in hand. The ninja is shrouded in darkness, with only the contours of their outfit visible. As a backdrop, the setting is dimly lit, creating an aura of mystery. In the shadows behind the ninja, there's a dragon-like spirit, serving as their protective guardian. The spirit of the dragon is ethereal and seems to emerge from the darkness, with its body partially transparent, symbolizing the mystical connection between the ninja and their otherworldly protector.