“kid, it was nice meetin’ ya.”

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So @mightyjetters was talking to me about an AU they thought up and they referred to Sans as Dreemurr!Sans and I was like “Wait, Sans is the king?” They actually meant something else but anyways I came up with this idea and I RAN with it.

Sans is king of the monsters in this AU. I came up with this design myself and BOY AM I PROUD OF THIS.

AU ideas under the cut

The skeletons and the Dreemurrs swap roles in this AU. Sans is the king and Papyrus took up the title of Queen since obviously Sans has no wife. THERE IS NO INCEST I SWEAR.

Sans doesn’t look like much, and he’s incredibly short, but he is extremely agile and powerful. He has only 1 HP, but he has special armor that increases his maximum HP by 10. He doesn’t break the game like he does in canon.

He wields a scythe as his weapon and doesn’t use Gaster Blasters.

He will constantly dodge your attacks, but he can’t dodge forever…

Gaster and Asriel switch places, along with Chara and Frisk.

This means Frisk is the first fallen human, and Gaster is the one that befriends them.

Papyrus takes Toriel’s role, leaving Sans once he declares war on humanity. He is upset that Sans deems all humans bad even though they probably only attacked Gaster because they were scared of him.

He isn’t nearly as harsh towards Sans as Toriel is towards Asgore in canon.

Papyrus takes it upon himself to protect humans from the monsters, as he is 100% confident that he can do that. Unfortunately, all the humans have managed to slip past him one way or another.

This time, he will make sure the human does not leave.

Like in canon, you can “lose” to Papyrus and not die. He simply takes you to your room. Of course, you can just walk out and challenge him again.

If you manage to persuade him or lose too many times, he will eventually let you go. He will tell you not to come back.

“I KNOW IT WILL BE VERY HARD, BUT YOU MUST DO YOUR BEST TO MOVE ON WITHOUT ME.”

Completely ignoring the fact you were intent on leaving.

Toriel and Asgore are still married, and they had a child once… but he disappeared without a trace one day and no one seems to remember he even existed…

Toriel is a sentry, though she’s not very good at being one. She keeps letting everyone through or chatting with everyone who walks by. She likes practicing her jokes on the door to the ruins.

One day, someone replied.

And they hated the joke.

Their reaction was so unlike anything she had ever experienced before that Toriel couldn’t help but laugh.

Though the person hated the joke, they still kept talking to Toriel. The jokes reminded them of their brother, whose jokes always consisted of bad puns.

One day, the person asked Toriel to make a promise. A promise that if a human ever left the ruins, that she would watch over them and protect them.

“I’M VERY CONFIDENT IN MY OWN SKILLS, BUT I MUST REMAIN IN THE RUINS.”



Toriel agreed to watch over any human that came by.

She appears to be kind and gentle, but if the human so much as touches a hair on Asgore, she will make them regret ever falling into the underground.

Asgore is a goofy, lovable man who is oddly eager to join the royal guard. The idea of fighting fascinates him, and he would love to see a human for himself. He even created puzzles for them to try out, with the help of Toriel, of course.

He eventually finds he just can’t bring himself to capture the human, so he lets the human pass.

The human can hang out with Asgore. If they try to date him, Toriel will not be pleased, and throughout their journey she will constantly remind them that Asgore is her husband.

Toriel is the final boss of the genocide route. She will break the game as much as possible to make you quit, and her remarks are just as scathing as Sans’. She can use one of Asriel’s attacks (which one, I haven’t decided), and her attacks are incredibly tough to dodge. Instead of poison, her attacks burn you. It’s still KARMA, though.

Unlike Sans, she doesn’t have 1 HP. She doesn’t dodge, either. But her defense is INCREDIBLY high. Even with 20 LOVE it will be very difficult to strike her down.

The battle progresses as you cut down her HP. When you have taken out half her HP, you get the chance to spare her. If you do that, she will kill you instantly. When she has only 1 HP left, she uses her special attack, which is nothing. She’ll wait there until you get bored and quit. However, she’s so weak at this point that she will eventually fall asleep, as long as you don’t try moving around. If you move too far to the left, she will force you back into the middle and you will have to wait even longer for her to fall asleep.

Instead of buttercups, red spider lilies are prominent in the underground.

Gaster and Frisk have a unique backstory in this AU.

Unlike Chara in canon, Frisk is docile and holds no grudge against humanity, though they climbed Mt. Ebott for the same reason as Chara.

Then what happened?

Well… A long time ago, Gaster was king of the monsters. He also had a wife. A wife who was killed in the war between humans and monsters. Gaster was left to raise his two children by himself, and his heart slowly grew bitter.

When Frisk appeared, Gaster was not happy. However, he eventually warmed up to the human when he realized that they truly meant no harm.

But he could never forget about what happened to his beloved wife.

One day… a sinister thought came to Gaster’s mind. He could absorb Frisk’s soul and go through the barrier to enact his revenge on humanity.

So he began meeting with Frisk in secret. He told them of his plan to break the barrier to free all monsters. Naturally, Frisk wanted to help, as they were thankful for what the monsters did for them.

Even though it would cost them their life, they were okay with that. If it meant that Gaster, Papyrus, Sans, and all the other monsters could go free, they were willing to sacrifice their life.

Gaster couldn’t just kill Frisk right there. Otherwise Sans and Papyrus would know they were killed. So Gaster took a bulb from the field of red spider lilies and gave it to Frisk. The bulbs of spider lilies are extremely poisonous. Sure enough, Frisk fell ill.

They told Gaster that they wanted to be taken to the human village and have their body lain there in the patch of crimson flowers.

The next day, Frisk died. Sans and Papyrus were heartbroken. Gaster, too, felt regretful that he had to take Frisk’s life in order to put his plan to fruition, but it was too late to turn back. He absorbed Frisk’s soul and became a being of unimaginable power. He took Frisk’s body and crossed through the barrier.

Gaster soon realized that he was no longer completely in control of his body. Frisk, whose soul he’d absorbed, now also had control.

Frisk realized that Gaster wasn’t just planning to collect six more human souls.

He was going to destroy everyone.

Frisk fought hard to keep Gaster from doing that, which resulted in them being attacked by humans.

Frisk forced Gaster to turn around and return underground. He had sustained severe injuries, and he collapsed in the throne room, his dust spreading across the spider lilies.

Sans was furious. Not only had the humans taken his mother away, they had now taken his father and surrogate sibling. Being the eldest son, he inherited the throne, and his first order was to wage war on the humans, and any human that fell through was to be killed.

And that leads to Chara, the eighth fallen human, whose decisions decide the fate of the underground.