Sans got from evrything sans the ability to go through au's and such sans and frisk started to run instantly to what evrything sans and frisk told them the hope that they got and they just had to find it.
The moment they left the man they first ran away came the author he looked at evrything sans and frisk saying "Well hello there evrything beings from undertale you surely know where classic frisk went right?"he smiled when he finished his sentence.
evrything frisk and sans looked at him them evrything toriel,papyrus,undyne,alphyd,undyne,asgore, flowey and gaster appeard.
The author smile went away for a split second but then a evil grin formed with the words that sounded like that of a demon "It doesen't matter how many you are infront of a true god you all are worthless".
With sans and frisk
Sans and frisk went through multiple au's already frisk said then "Do you really think it exist they did say that it is like a fairytale I do know it is our last piece of hope but...." sans cutted through frisk words before she could finish talking "We need to find that frisk if that book what they told us hold evrything that we need to know then it will surely be helpful in anyway" there was then a silent between those two it was just akward.
Till they started to hear a familiar voice saying "Frisk~" the voice just sounded as if it right behind them they looked back but didn't saw anyone.
Sans said "We better continue to move or we will get caught" they continued to travel through au's as fast as they could but the voice of the author continued to be right behind them all the time.
They don't know how many au's they traveld but it was more then 40 they though.
Sans soon got tired from all that traveling the voice of the author also didn't come anymore so they stopped they were in a... void yea it was just a void.
Frisk looked around sans told her "Just rest kiddo his voice is gone maybe he couldn't reach our traveling speed or got confused because it is not like you can know which au someone goes" but frisk ignored sans she just didn't listen to sans but then frisk heard chara shouting "FRISK DODGE" frisk didn't knew where to dodge so wanted to get control of frisk but it was to late a chain wrapped around frisk body and got pulled frisk saw the author he punched then in frisk head kicking chara out of her body.
Chara got surprised on what he did sans seeing the author tp beside above him and shoot a gaster blaster right at him but no use there was something blocking it the author laughed "Well now this game has ended evryone I hope you all will die without complaining" and he dissappeard with frisk somewhere into the unknown.