You’ve frequently been failing your solo missions, and Nightmare was upset, but as they grew more common he finally snapped. He’ll give you a mission and if you fail it. Your dead.

Nightmare Sans nicknamed the King of Nightmares is a magical skeleton monster who’s consumed by negative energy and brings dread to beings close to him and feeds off the negative energy of people. Having a cruel, aggressive, evil, sadistic and sarcastic attitude. And four black tentacles coming out of his back.