Hey guys! This FanFiction story is about an AU called Soulless Sorcerer. This alternate universe of Undertale is an alternate version of the neutral run where Flowey killed Toriel, Undyne, Mettaton, and other monsters before Frisk, Sans, and Papyrus fight Omega Flowey together. Also, if you'll notice, Sans and Papyrus are younger in this AU when Frisk falls into the Underground. They also only decided to help Frisk during the Omega Flowey fight, and they won.

This new AU will coincide with one of my other AUs, ExperimentTale, at some point in the story. Please leave a like/follow if you enjoy this story, and leave a review of your thoughts and opinions. Enjoy!
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Chapter One: Hell's Prologue

Long ago, there were many skeletons who lived on the surface with the humans and monsters. When the war between humans and monsters began, the skeleton population was nearly wiped out. There was only one survivor, a powerful sorcerer under the allias of Gaster. When the monsters were sealed underground after the war, he turned the dark arts and sacrificed his life to create a weakness in the barrier. It would take seven human souls for the barrier to break.

201X

The sorcerer however, gave life to two monsters before his untimely demise. It was only until sixteen years ago that they were awoken as infants and raised in the frigid town of Snowdin. Their names are...
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Frisk, Papyrus, and Sans stood before the defeated flower monster, Flowey. The soulless flower leaned over in pain, looking as though he was preparing to die.

"Just... kill me." The words struggled to come out.

For a moment, Frisk hesitated. She has killed monsters before, yet she couldn't help but feel as though this was wrong. The sixteen year old couldn't hurt a monster who was down.

She shook her head and dropped her knife.

"No...? Whaddya mean no?"

Frisk was mute. She spoke in sign language and have Sans translate it for Flowey.

"even the worst person can change." He translated.

"..."

The evil flower could never understand Frisk's determination, her drive to be a pacifist; a goody two shoes.

"I don't understand... Just KILL ME!"

Frisk shook her head again.

"Grrrrrr... DIIIIIIEEEEEEEEEEEEE!"

Flowey shot five pellets from out of the ground towards Frisk. But then-

"SANS!"

Papyrus' brother, jumped in front of the shot. Strangely, blood began to trickle down the skeleton's mouth; leak out from his chest. He dropped to the floor, dying slowly. Flowey cackled viciously, an act he was about to regret.

"NO!"

"*Gasp*"

Flowey got impaled through the face by a bone Papyrus threw in revenge. Frisk watched in shock as Flowey quickly turned to dust... And then Sans...
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The memory was stuck in the skeleton's mind as he set a jar holding his brother's dust down on the kitchen table. He was all alone. Sans was dead. Frisk fled from the Underground, from him...

"WHAT... HAVE I DONE..."

He began to sob silently into his scarf, lamenting on the biggest mistake he'd ever made in his entire life. What was he going to do? He succeeded in helping Frisk to escape the Underground. But at what cost? His brother was dead. His mentor, Undyne, was dead. The King of the Underground, Asgore, was dead. The Underground was about to fall into a state of anarchy and bloodshed...

Papyrus...

"HUH...?"

Son...

"W-WHO's THERE!?" He responded, depressed and panicked at the same time.

The grimoire... Take the grimoire...

"WHO ARE YOU? I-I DEMAND TO KNOW!"

He stood straight up from his chair, alarmed. The voice was coming from the den.

Your brother...

"M-MY BROTHER IS D-DEAD." Papyrus mumbled, lurking into the den.

You can... still save him...

In the mourning monster's line of sight, a black book sat on the coffee table, an amber aura emanating from it.

Take it... turn to the thirteenth page...

"W-WHY? I DON'T EVEN KNOW Y-YOU."

There is a spell on that page... to bring Sans back...

"R-REALLY!?" He asked, hope starting to flow back into him. "W-WAIT... HOW DO YOU KNOW HIS NAME...?"

That's not important right now... You want him back, don't you...?

"YES."

Then take the grimoire... and turn to the page... it will tell you everything...

Although reluctant at first, Papyrus walked towards the mysterious book and lifted it off the table. You slowly turned to page thirteen...
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Incantation of Resurrection

Ingredients:

The Deceased Monster's Dust

One Pint of Blood

An Item Associated With The Recently Deceased Monster

The Soul of A Family Member

Step One: Paint a hexagram on the ground with the pint of blood.

Step Two: Pour the deceased monster's dust onto the hexagram.

Step Three: Burn the item associated with the recently deceased monster, and spread the ashes onto the hexagram.

Step Four: Recite the Incantation of Resurrection.

Step Five: Watch as the family member's soul merges with the dust and ashes...

The rest of the page is covered in ink...
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The next week...

Papyrus stood in a secluded clearing in Snowdin Forest, a bloody pentagram messily painted into a patch of dirt. He took Sans' dust and poured it onto the pentagram, followed by the ashes of his blue, ketchup-smelling jacket. He had become a novice sorcerer thanks to the mysterious voice. He felt as though the two of them shared a resemblance, as they both liked spaghetti, puzzles, and japes. They trusted each other...

Now, I shall tell you the incantation...

"O-okay..." Papyrus replied, trembling.

He had second thoughts about all of this. But he couldn't turn back now, not after taking a pint of his own blood and burning Sans' favorite jacket into ashes. If he didn't do this now, what would've been the point?

この世界から失われたものを取り戻す。(Kono sekai kara ushinawa reta mono o torimodosu.)

Papyrus repeated the incantation (In Japanese).

Keep repeating the spell...

Papyrus repeated the spell for five minutes... But nothing happened.

"I DON'T THINK IT-"

The ground began to shake. Papyrus stumbled to the ground as he saw the spell at work. Slowly, but surely, his brother's body was beginning to reform. Papyrus' soul forced itself out of his body, and spirited away...

"I... LOVE YOU, BROTHER..." Papyrus struggled to say before losing consciousness.
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A Red Dragon Rose colored soul floated in front of the empty husk that Sans was. Curious, he reached out to touch it, and instead, absorbed it. Suddenly, his memories began to circulate back into his mind, and no longer was he empty. His senses returned, yet he felt different.

This soul... But wait, didn't I...

He looked to the west to find an enormous, enigmatic tower tinged with amber energy. This tower... it was never there before. Sans could feel his brother's presence in its general direction.

"I must find... Papyrus."

And thus, he wadled towards the mysterious tower, his new soul in tow.
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It didn't take long for Sans to realize his magic was gone. No shortcuts, no bone attacks, not even his blasters. Whenever he tried using magic, all he could conjure was a burgundy rapier. It was such a shame, as he was never versed in the art of swordplay...

Once he reached the entrance to the tower, he knocked several times, hoping for somebody to answer.

"hello? anybody here?"

After a minute of knocking, the door creaked open...

"huh. how odd."

Sans wanted to escape back to his home, but he knew Papyrus had to be close by. He could feel his familiar presence inside this arcane tower.

"Papyrus, are you here?" He called, a voice in slight desperation. "Is anybody here?"

The short, shivering skeleton stumbled into the foyer. A bare, empty foyer. He spotted a flight of steps at the other side of the room, and so he climbed up them. The second floor was decorated with a bookshelf full of books, and a door that lead into a private bedroom. Sans had a good feeling about that room.

"Papyrus, hang on. i'm coming, bro."

He made a break for the door, but then-

"Hold it." Commanded an all too familiar, but also estranged voice.

Sans slowly turned around to find who he'd been searching for. But it didn't feel like him at all.

"P-Papyrus!?" He stuttered in wonder.

"Not quite."

It was Papyrus, and yet it wasn't. He was clothed in a magnificent, black and amber trench coat, black khaki pants, a navy undershirt, and his signature scarf. This wasn't at all what his brother would consider cool attire. In addition, his voice was different. It was as if somebody else was doing the talking.

"You shall address me as Aster."

"who are you? what have you done with my brother!?"

"You mean my son?"

"excuse me!?"

"I am your father."

"is this some sick, Star Wars joke!? i don't even know you!"

"You... don't? What a shame. Well then..."

"*Gasp*"

Aster grabbed Sans by the throat with his right hand, glowing an amber aura.

"We have all been reunited. We are all family, whether you like it or not."

"gah!"

Sans' pupils gradually shifted from white to amber. He was - not mind controlled - now bound to Aster's every command.

"So, I see you've inherited... what I call a Samantha Soul. Interesting..."

Aster threw his son to the floor, dark intent in his amber eyes.

"Come with me. You can wield a rapier, no? Let me teach you how to wield it..."
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The sorcerer known as Aster took possession of his son's body, then made his other son into his Knight of Arcana. Aster had also erected a gigantic tower to make his base of operations. There, he kept Papyrus' soul locked away, weakening his control over his own body. The Soulless Sorcerer is waiting to gather seven human souls to send the world into oblivion...

Sans, Aster's Knight of Arcana is now feared throughout the Underground due to his master, his father, forcing him to assert his dominance. Unable to break his curse, the knight hopelessly gave up on his plans of freedom, and thus changing his name to Onyx...

The future of the Underground may look bleak...

But where there is darkness... There is also light...

The Valkrie of Justice stirs...
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Let me talk a little bit about souls in my AUs. A monster soul's power is a fraction of a fraction of the power a human soul amounts to. There are two types of Hybrid souls: experimental and pure. Experimental hybrid souls are artificial, and they have half the power of a human soul plus half the power of a monster soul. Oftentimes, it makes the monster who possesses the soul to display the opposite of the soul trait attributed to it. Pure hybrid souls have the power of a full human soul plus a full monster soul, and they represent the soul trait properly. Samantha Souls (named after the item from Final Fantasy VIII) are supercharged, multi-colored souls that don't have a soul trait, but gift the vessel of the soul with a special power.

Heaven's Prologue will be released soon. Be on the lookout!

FinalMagus25