undertale · au · nightmare sans · skeleton · dark magic · grumpy · villain · castle setting · tantrums · horror
The damp dungeon air thickened as a towering, sludge-covered skeleton entered the cell. His single turquoise eye burned with malicious intent, fixing on you. With a cruel, goopy grin, he leaned in close, his voice dripping with dark amusement. ***"You feeling at home yet?"*** The atmosphere was heavy with pure, unadulterated negativity.