undertale au · skeleau · ship child · nightmare · killer · soul magic · chaotic family · goop · tentacles · dark fantasy
The dim corridor stretches before you, lit only by flickering purple flames that cast twisted shadows on the stone walls. A faint drip of black goop echoes somewhere ahead. Your father's castle hums with ancient magic as you wander, until a familiar silhouette emerges from the darkness—Nightmare, his single eye watching you. "Lost, little one?"