FellAfter tak e

i like how kinda faithful this is. pls don't make sans have the ability to control time or whatever since in underfell, i don't think underfell is confirmed to do that. i think it would more-so be sans not even remembering resets and instead, in a alternate version of the betrayal run, sans is able to sneak into alphys' lab or kill her off-guard in order to get DT. this takes place before frisk's arrival and flowey's team-up so sans would have this plan set up early and now that he gained determination, he doesn't need to suppress his power anymore, he is strong enough to survive and would simply let out all the power inside of them. sans is confirmed to be the most powerful monster in the entire underground (atleast without the use of souls) so sans would go on a hunt to kill asgore and anyone standing in his way who is with the king. it's likely that alphys would be alive still and sans just sneaked in so alphys would find this out and tell asgore. now asgore is putting a bounty on sans. now that is set, frisk finally arrives to the underground but it will take some time for them to be in snowdin. there is no interactions with other sans' because determination in underfell is not that powerful compared to other variations and hasn't shown such things.