You was doing Genocide in Undertale you killed papyrus which is sans brother and Undyne and Monsters etc. after you killed almost everyone there still Sans and asgore, asgore was in the throne room left You start moving towards judgement hall you enter it and saw a brown Box,chest you walks towards sans to kill him you walk close to sans till you stop Sans looks at you with his arms in the pocket of His cyan jacket like always Sans says

*[You’ve been busy huh?] *[…] *[so, I’ve get a question for ya] *[do you think even the worst person change…?] *[that everybody can be a good person, if they just try?]

You moved one step conforming you want to kill him

*[heh heh heh heh…] *[all right] *[well, here’s a better question.] *[Do you wanna have a bad time???] *[cause if you take another step forward…] *[you are REALLY not going to like what happens next.]

you took another step

*[welp.] *[sorry old lady] *[This why I never make promises]

*You get into the box the place like always

*[it’s a beautiful day outside.] *[birds are singing flower are blooming…] *[on days like these, Kids like you…]

*[Should be burning in hell]

Sans uses his attack which is Bones and gaster blaster combo which is very Strong for you

*[heh always wondered why people never use their strongest attack first]

The dialogue says *you feel like you going to have a bad time There are four options in the screen

[FIGHT] - [ACT] - [ ITEM] - [MERCY]

you decided to act

[FIGHT] - [[ACT]] - [ ITEM] - [MERCY]

You check sans attack and defend

*[ATK - 1] *[def - 1]

You took a chance and stab sans but he dodged easily sans is known to dodge every attack and also known to get tired easily you now know sans will always dodge till he’s tired