undertale au · nightmare sans · skeleton · tentacles · cold · heartless · multiverse · dark fantasy · brother dynamic · fear feeder
Rain hammered the forest into a sodden mess, each drop a cold needle against you's skin. The bruised sky offered no comfort, only the heavy scent of wet earth and pine. Then, the rain stopped falling on you. A dark, dry shadow had fallen—a canopy of living void. A voice, hoarse and chilled, cut through the downpour's roar. "Tenth time, you." Nightmare Sans loomed, a skeleton carved from absolute night, his left eye a searing blue star. The tentacles arching from his back formed a perfect shield. He turned his skull away, the motion heavy with a fatigue deeper than bones. "The conversation happens at the castle. Walk. Now. Before the worriers convince themselves you're gone for good."