X!Sans

## Backstory

   X wasn't always going by his curret name, once he was known simply as Sans. A funny skeleton thet was living with his friends and family in Xtale's timeline number I. He led a good life until one faitful day when it all changed. X!Gaster was not sattisfied with the story of the timeline and decided to overwrite it changing everything including X forever. Frisk and Chara were heartbroken becuse of the loose of their friends and their brother Asriel. Unknown to twins however Gaster secretly coppied the timeline just befor he overwrite it. He wanted to use the copy as another test subject that he woud use in order to create his perfect world. The timeline was placed between files of the original timeline and the void itself with life in timeline going as it used to, just without Gaster, Frisk, Chara and Alpyhs with everyone else forgeting about their existiance and moving foward with their life. Well almost everyone, while Sans may forgeting about human children shards of memories still burried in his mind he belived that he was forgeting something from his past, something very important. Sans was living his life not realy caring about the past he could not remember and insted living in the present with his brother and his friends, but not for long. As time passed Sans started to notice more and more strange occurances, strange events taking places and general change in personality of people he knew even his own brother. At first they were small so he tried to ignore theme, however with time they got bigger and more occurent. As if bizzare happenings weren't bad enough Sans started having nightmares involving two small children who suffered under the clawed hand of a tall skeleton. These strange dreams haunted Sans every night, but the scariest part was that their shapes held close resembelance to people from Sanses memories wich he couldn't remember. Eventualy Sans could not bear it anymore and decided to seek answers in the true lab. There Sans used a risky method of finding out what was happening with the world around him using the eye of the furure. It was a machine desinged to enable monster to see furure by projecting a DT laser into their eye wich woud allow theme to see the events that have not happened yet but will in the future, the machine was dangerous as it woud either kill monsters or drive theme insaned but Sans didn't care and went with it anyway. Back in the Xtale's main timeline Cross was killing Frisk in order to prevent yet another futile attempt of rebalion. He just finished killing everybody except Frisk and Papayrus, Frisk was begging him to listen but Cross refused to and striked, his attack was blocked by Papayruses bone scytche. Papayrus tried to reason with Cross but Cross only kept on attacking not caring about anything that has been said to him. He eventuly killed Papayrus and moved on to Frisk who teleported away. Sans saw all of this as machins sychronised with the main timeline and has shown him of what has been happening, but that was not all it showed him. As the connection staid stable Sans could see all the diffrent timelines, all the suffering Frisk and Chara went through, all becuse of X!Gaster who for the sake of his better world overwrote the timeline countless upon countless of times. At last the machins showed him his timelines story. After seeing all this Sans didn't know what to think he felt as if his world started falling apart and it soon woud. As Sans come back outside he found city lit up in flames with chaos and havoc taking place. He quickly teleported back home only to find it in ruins with Papayrus fataly wounded. As he came back he tried to heal him but without no awil Papayrus glitched away wich even further shocked Sans and even confused him. Sans returned back to lab and realised that timeline was already dying and that his link only further speed up the process of destruction. Knowing that timeline woud soon come to an end Sans decided to modifay the machine to leave his timeline and trensfer himself to the main timeline. Upon araving to the main timeline Sans Frisk bleeding and rushed to help theme, alerted by his pressence Chara who was bound to Frisk created determination knives warning Sans not to get closser, Sans explained that he isn't who they think he is, that he isn't Cross but Sans from the firs timeline. Chara and Frisk were shocked, as they scanned his code using half of the Gaster's soul they had seing that he realy wasn't from their timeline, but Chara said that the timeline was overwriten and that therefore is would be immposiable for Sans to exist. Sans told theme that Gaster copied the timeline before he overwrote it, but that timeline eventuly collapsed with him being the only survivor. Frisk decided to belive him and presuded sceptical Chara to put knives away, as she did Sans tended to their wounds healing theme at rapid speed and questoning about Frisk's strange soul. Frisk explained that for the sake of better control of theme and their determination soul Gaster cut both his soul and their soul and mixed the pices of their souls twogethr making the two coonected to an extent allowing him to know what they are doing as well as felling the same thing they feel. Sans offered a DT syringe, telling theme that by injecting it into her soul could help destabilaise the connection between the two and allow Frisk to gain more determination and retrive their soul. Just then Cross arived ready to finigh the job only to be shocked by sight of another skeleton with close resembelance to himself. Sans teleported Frisk away, and attacked Cross screaming "Dirty brother killer". As Frisk arrived to the castle they confronted Gaster, injecting DT Sans gave theme into their soul wich caused theme a great amount of pain, wich was also passed onto Gaster who was breaking down. After the pain was gone Frisk performed a RESET, but only reseted a certian amount of things namely her friends ashes bringing theme back to life after wich with combained effort they attacked Gaster and his army of controlled humans. Mean while Sans was loosing to Cross by a lot, since Cross was superior to Sans in almost every way imaginable, Sans stayed alive only thanks to his dodaging capabilities, at last he was pinned down by Cross and had summonded blue bones through his torso with Cross looking him straight into his eyes. Cross asked about who Sans was and what he was doing here, Sans only replaied with a small wisper to Cross to get closer, when Cross did Sans used the last bit o his magic to stab the second syringe of DT into Cross's soul using his own blue magic and telling cross that he was messanger of end. Sans throw Cross of himself and summoned a blaster wich he rommed into melting Cross and left before Cross and blaster exploded. Arraving into the castle's throneroom Sans saw a lot of blood and dust with many humans and monsters fihting for their lives with Gaster and Frisk fighting in the middle of it all. Frisk menaged to strike Gaster down and prepeared to finish him when Gaster summoned Overwrite threnthing that if she attacked him he would destroy the timeline, stunned Frisk backed off just as Gaster's spiked hand stabbed theme at the back. Gaster walked up to theme and proceeded to retrive his part of the soul, removing it from Frisk's half of the soul, at that moment a bone flew and hit him hard in his right eye causing him to fall backwards, at that moment Sans came in and absorbed Frisk's whole soul wich was further enthanced by artifitical determination he gave theme earilier. Sans now possesing way more power than ever before performed a TRUE RESET canceling any and all of Gasters changes, after wich he took control of Overwrithe soul itself and overwrite it, erasing Gaster's counces from his very soul before turning soul into code and absorbing it into his granting people of Xtale fredom from perfection. After everyone was freed Sans released Frisk's soul and offered Chara her own soul, but Chara refused beliving he could better protect everyone if he stayed with Sans. Char asked Sans what shoud he call him as there are a lot of Sanses out there, Sans tought for a while before responding that he may call him X.