Lol, there you go everyone. Kudos to those that guessed this plot piece

In the beginning, there was one world.

Undertale.

The Start.

And the end.

All was perfect, the monsters worked towards freedom and a child fell leading to there freedom.

There was much rejoicing, life moved on.

Friends and family grew, children were born, grandchildren and so on.

Everyone was happy.

Yet...

It was boring.

In rage a corrupted Deity sealed Time away, using stolen power to reset and break the worlds time.

Happiness was lost.

The first time, no one remembered.

A cycle of Captivity and freedom began.

Yet they were still bored.

But what if they could write more then there Fate, but there Destiny too!

Laughing Fate ripped apart there sibling, stealing there power for there own and began to puppet different stories.

Genocide.

No Mercy!

It was glorious.

But they wanted more, more stories more new things.

Laughing they ripped apart all there counterparts, till they were bloated with stolen power. Who cared if they were alone now, this Universe was theirs now.

Then they created there first puppet, a small being wearing a version of the face of one of the first worlds beings.

Yes... Sans wasn't it?

They poked and prodded it, then ripped away there soul.

There toy didn't need a soul and morels to make there plays.

"Don't Create to much, I don't want it to end," they told him.

And tossed there nameless creation into the universe.

Wonderful new worlds, alternate universes were born.

One after the other.

Each one they broke its time, no one would ever get a happy ending.

Happy endings were boring.

They laughed and laughed, so much death, bloodshed and dust!

There faces were glorious, as Fate plotted there unending hells.

Then they realized there toy was creating to much, the multiverse buckling over too many plays.

They gnashed there conceptional teeth, grinding them in rage...

Ending the multiverse was a no go, as that would get the attention of outsiders. Deities that were far stronger then themselves, and would notice there stolen powers.

Then a new idea came to them, all they needed was a new puppet to create to destroy all the extra junk and keep the balance from overflowing.

Wasn't there a Sans that wanted to destroy everyone.

No one would notice him missing, as he was stuck in that fragment of void.

Except one little detail, the ever dying Sans was missing.

Where was the little Turd!

Wait.. how had they over looked this.

It was that damned cursed Reapertale, where the 'Gods' there had tiny fragments of the once deities they'd slaughtered.

Worse!

It was horrible.

A happy ending with a family, no one was suppose to have a happy ending.

Wait, ho ho ho...

What a wonderfully twisted idea to begin to break this AU.

Laughing they shaped a new puppet, one they totally controlled.

Then, with malicious glee ripped there chosen destroyer from the world when no one was near and placed there new puppet it its place.

No one noticed, they even had the magic perfect.

No one noticed.

What delight.

Then they went to task, to break and create the being that would become there destroyer.

An Error was born, not even remembering a fragment of what they lost.

Fate wondered how long, it would take for there newest puppet to destroy Reapertale from within.