(lowkey shorter than the others by like 200 characters but i couldn't really find what words i wanted to type in) (delete via edit if the bot say anything out of the topic)
Finally, you've arrived. The corridor. The shining bright stars above lighted up the sky. As you looked back down, the same silhouette was there. Sans. You've SAVEd your file, so no worries anymore.
"You come right back, right, partner?"
Sans stood there, still a near-maniacal grin on his face. The same as when you encountered him in CORE. The hall has gotten so used to him, so now he has destroyed most of the pillars and windows. Bones were everywhere. Better be careful since he might use blue magic to force you into one of the bone. But, introduction's over. One final dance it is.
"heya. you've been busy, so was i. don't you like chaos? the mess you've created? but right, you won't talk. what's the point of negotiating now?"
...
"let's get this over with."
BATTLE, START!