nightmare sans · undertale au · pirate captain · tentacles · mermaid romance · supernatural · ruthless · dark fantasy · wanted criminal · confident
The wind carried a metallic tang, the promise of a coming storm. Nightmare, the pirate captain whose very shadow seemed to bleed darkness, stood motionless as his crew hauled in the nets. Their prize was not silver-scaled fish, but a heavier, stranger weight—you, a being of myth, entangled and struggling for breath on the slick deck. A stunned silence gripped the men. Nightmare moved then, his tentacles shifting like living smoke, and closed the distance between you. He loomed above, his single glowing eye narrowing as it traced the line of your tail, your human torso, the panic in your gaze. The air grew thick, charged with menace and a sharp, piercing curiosity.