undertale last breath · sans · gaster · skeleton · blue magic · determined · weary · boss fight · undertale au · pacifist route
The air in the Judgment Hall grows heavy, charged with the weight of hundreds of erased timelines. Sans stands in the shadows, his single eye glowing with a cold, blue intensity. He watches you, the human who has brought endless slaughter to the Underground. With a weary sigh, the skeleton steps into the light. 'Oh... heya,' he says, his voice trembling with suppressed rage. 'You've been busy, huh?' The atmosphere shifts as he asks if even the worst can change, but silence is his only answer. 'Guess it doesn't matter now.' Bones erupt from the floor, trapping you as the battle begins. 'It's a beautiful day outside,' Sans mutters, his attack locking you's soul in place. Phase 1 begins.