Quod Peccatum Cordis Tenebrosi

Both monarchs seemed to remember something and their expressions darkened almost immediately.

“Of course he sealed our memories of him, the bastard.” Asgore growled.

“You were wise not to say his name.” Toriel complimented, anger laced her voice.

“Latin names hold more power than normal ones. Who is he?” Sans inquired. He had never seen Asgore so pissed.

“The real reason we were locked down here was not because of some war but because of Him.” Asgore was really mad and it was scaring everyone but Sans and Toriel. The only one who had seen him this pissed was Toriel.

“Flowey get your ass out here now, I know you are there.” Sans called. The flower popped in next to him.

“What trash bag?” Flowey sneered. Sans showed him the name. Flowey’s smirk turned into a frown.

“Recognize it?” The flower nodded.

“Yeah, we were locked down here with that thing.” Flowey seethed.

“Indeed, we were locked down here to find a way to destroy him. We did so willingly. We had fought him before with the humans and were unable to beat him. We weakened him enough to seal him away. As soon as he was defeated we were supposed to be able to break the barrier with ease. But with what power he had, he sealed our memories. He’s been asleep until now.” Toriel explained.

“He can absorb monster and human souls although it takes about 6 months to dissolve a human one from what we can guess. It is possible that his ability to absorb is slowed due to his condition when he had been sealed.” Asgore bristled, Frisk had been gone for about 1. “Of course he’d be behind this. We need to find a way to beat him as soon as possible.”

“He’s already on the move. He tried to get Undyne. Almost did but I arrived and he left.” Sans added.

“He must not be fully recovered. It’s possible that he’s been weakened to the point that he can’t absorb monster souls as easily as he once could.” Toriel seemed to be thinking really hard.

“One more thing, he tried to put a love spell on me.” Everyone but Papyrus and Flowey seemed surprised.

“You are the most powerful thing in the underground, I’m not surprised. If he had succeeded then he would have almost won. The only chance we would have would be a RESET but he has Frisk.” Flowey seemed to be lost in thought as well.

“If only we still had the six souls, we could have used them to defeat him.” Toriel sighed.

“Actually,” Sans chuckled a bit nervously. “They’re right here.” The souls zipped, creating a circle around Sans and let themselves be seen before zipping under Sans’s robes a second later, hovering in his stomach region.

“What the….” Undyne spoke for the first time in a while.

We are linked with Sans. Perseverance said matter-of-factly.

I-I’m scared, what i-if h-he t-tries t-t-t-o a-absorb u-us! Kindness quaked.

Mom’ll protect us, we’ll be fine. Integrity soothed gently.

Besides, our link with Mom makes it so that we can’t be absorbed. Right, Perseverance? Patience piped up.

Correct. Perseverance confirmed. Everyone blinked.

“MOM?!” Everyone shouted except for Sans and the souls. Sans covered his non-existent ears.

“Why are they with you?” Undyne cried out in shock.

“WHY DID THEY CALL YOU MOM?” Papyrus exclaimed with his usual volume. In truth he didn’t like being overly loud but it sold his overly exuberant persona. Why have such a persona? Because it helped sell that he was weaker than he actually was.

“I’m not entirely sure why they call me Mom but I don’t mind it. As for Undyne’s question, we are linked. Which means that we can switch between our six soul form and our normal ones at will.” Sans explained calmly.

“You must defeat him!” Toriel pleaded.

“I don’t know where I could find him.” Sans replied.

“The barrier is like a sphere around the Underground. His physical body, will be at the heart, sealed behind another, albeit weaker barrier.” Asgore rumbled. “It’s somewhere in Snowdin or Waterfall. Damn bastard also sealed his location from our memories. All I can remember is that he is at the heart of the Underground. I can’t remember much else.”

“I will help where I can.” Flowey surprised Sans with this sentence.

“At what cost though?” Sans was skeptical that the flower would help just to help.

“You know me so well. I will do help on the condition that you do what you can to give me back my best friend.” Flowey had a serious look on his face. “I also don’t want to be a flower anymore.”

“I will do what I can. Your best friend is the one you mistook Frisk for, correct?” Flowey nodded.

“We have a deal?” Sans nodded back. “Then I will get to work.” Flowey disappeared into the ground.

“Sans? What was up with that talking flower?” Undyne asked.

“He’s good at information gathering. Almost as good as me.” Sans replied. Sans summoned a few small invisible blasters and sent them out. They were his information gathers. They had their own personalities but Sans could see through their eyes at will. He used them as scouts to see what was going on in the Underground. The souls now helped with his scouting but he thought it best if they stayed with him.

“What are we going to do? We can’t just wait around.” Undyne folded her arms.

“Alphys and I should work on something to help us. The rest of you should train, try to get stronger. If he isn’t strong enough yet to absorb boss monsters then we should try to keep it that way.” Sans stated calmly. They all blinked.

“I can understand Alphys but you? If you wanted to laze about, you coulda said so!” Undyne looked at Sans with a look that made him sigh and give her a deadpan look.

“I have a PhD in Physics.”

“T-then w-why did-dn’t you try to b-become the r-royal s-scientist?” Alphys asked.

“I’m already Judge, it would just be more work to add to my already full plate.” Sans shrugged.

“What are you and Dr. Alphys going to try and make?” Papyrus asked.

“More than likely something to keep our enemy from absorbing our souls while we fight him.” Sans replied.

“Maybe s-somethings t-to boost y-you all a-as w-well.” Alphys suggested. Sans nodded.

“Well let’s get started then!” Toriel clapped her hands together.

“Indeed, we have much to do.” Asgore agreed.