A/N Happy 10th chapter! I know I don't say much about this story, but I think it's better this way. Leaves more to any rate, I've decided to make this story weekly so that I don't finish it too quickly. I can't really say for sure how many more chapters there will be, but I still don't want to finish it, like, next week at this crazy pace I'm going lately. So, there will be an update sometime during the day every Wednesday starting last week! Thank you for reading! Now, back to the suspense.

It was silent for a long moment, Sans' eyes turned black as he looked at you. You suddenly were unsure if this was the right choice. Had Sans tricked you? Did he send you to be killed again at his own hands? Did he really believe you were out to help Frisk kill everyone? If he didn't listen to what you had to tell him, how would you be able to save everyone?

Could they even be saved?

Your process of panic was broken by a sudden chuckle that burst from Sans. It makes you jump a little as you look at him. The white of his eyes watches you, but they aren't as suspicious as they had been in previous timelines.

"Wow," he says then, "that's... uh... really childish."

You blink in surprise. Was he serious? Had he really been playing you this entire time, "Huh? Isn't that your 'secret secret codeword' or something?"

Sans winks and shrugs "Why would you think that? I don't have a secret secret codeword. Whoever told you that is a dirty liar."

You slump your shoulders and sigh. This was all a trick. It was too good to be true.

"However," Sans went on, holding a finger up, "I do have a triple secret code word. Which you just said. So, I guess you're qualified."

There was a pause as he waited for you to answer. Once you managed to process what he said, you straightened up, "Wait. So... so that's it? I'm in?"

"Sure kid," Sans shrugged, "Now, you look as if you're burning to tell me something. Shall we go somewhere more secluded to talk?"

Before you can answer, Sans snaps his fingers and you're instantly somewhere new. it reminded you of Alphys' place, but it was much smaller and much neater. There was only a counter with a bunch of drawers and blueprints and a large curtain separating the room. You look at Sans, all these questions just brimming. But, one came to the surface, "Wait, you were serious? That wasn't sarcasm?"

Sans held a hand up as he leaned against the counter, "Hey now, sarcasm isn't funny. I really do have a triple secret codeword for special occasions. If I gave it to you, it was surely with good reason."

His words reminded you of what you had to say, what you needed to tell him. You sat your fist on your open palm and nodded, "Yeah! You know about the human, right? The other human?"

Sans nods, "Yeah. They've been resetting the timeline and causing a bit of trouble."

"There's something you should know about them," you fold your arms, "How can I explain this? You see, Frisk doesn't have a heart."

Now Sans seemed confused, his eye socket raises as if he raised an eyebrow, "What? How do they fight then?"

"Your SOUL is different from your heart. Something can have no heart and still have a SOUL, that much is clear. Frisk has to be what's called-"

"-a Nobody."

You nod, but then blink in surprise, "Huh? You know about them?"

Sans shrugs, winking at you, "Who knows? Maybe I've heard all of this before. You do have a tendency to repeat yourself." He joked.

You start to wonder, but then just put your hand on your face, "Sans, please," you sigh. Sans laughs and just waves for you to continue, "Frisk is a Nobody, yeah. But, if their Nobody is here, then that would mean that they have a Heartless here as well."

Sans narrows his eyes a little, "How can you be so sure it's down here?"

"Whatever enters the barrier can't leave, right? Frisk probably lost their heart down here, so their Nobody and their Heartless have got to be down here."

You hold a finger up as you remember something, "But that's not all. Frisk is being controlled by a different Heartless. That's why they've been causing so much trouble. On their own, a Nobody isn't much of a threat. Its only when they are corrupted that they become dangerous. At least that's how it seems anyway."

Sans stands up straight and holds his hands up to you , "Wait, hold on. So you're telling me that there is the possibility of there being two heartless down here?" He said. You nod and he goes on, "So, why isn't there more of them? Heartless are drawn together, aren't they?"

You fold your arms as you think about it, "I dunno come to think of it, they are drawn to the power of my keyblade," you hold your wrist up, looking at the key hanging, "Maybe the two heartless here don't know how to call others."

"Or maybe they're already here."

Just as Sans said that, the ground began to shake violently. You looked around, suddenly in a panic, "W-Whats going on?" You shout over the roaring of the earthquake.

Sans steadied himself against the counter. He looked around, more confused than you felt. He started to say something when another voice broke through, "Sans! Are you here?! The house is falling in!"

"Papyrus!" Sans looked up and yelled, "Get outside!" He bolted for the door faster than. Your ever seen him run. As you regained your own balance, you ran out after him.

Back outside, the town of Snowdin was covered with shadow heartless. They were everywhere, attacking the monsters in the town, and popping out from the shadows. As the ground finally stopped shaking, you saw Sans coming towards you with Papyrus leaning on him for support.

"I hate to say I told you so, kid," Sans said, "But, now's not the time to joke about how right I always am."

"Sans, what's going on? Who are these creatures?" Papyrus was rubbing his skull as he looked around.

Sans kept his gaze ahead, "Call Undyne. Tell her to meet us at Alphys' lab." He looks at you as Papyrus seems to struggle to dial his phone for a moment, "Sora," he pulled something from his pocket and tossed it to you, "Sorry for doubtin' ya. You got this, right?"

You caught what he gave you and blinked, looking at it. It was a keychain that looked a little like the robot on the sign and the fountain at MTT resort. It confuses you for a second, but when you look up to question Sans about it, he's already gone.

Sora, heartless, snap out of it! You look to your side and see Roxas pointing back towards the town still being ravaged by shadows.

"Oh man!" You turn around and step back to gather yourself. You grab your keyblade in your hand and look at it, "It's time to get serious! No more playing around!" You held the key up towards the ceiling, focusing your energy into it. As it starts to glow, you look at the keychain Sans gave you and smile, clipping it to your key. It quickly expands back to its original size. It was in the shape of a long and skinny skeleton key, with bones for the handle, and an upside down heart on the head. You grin and look ahead, "Alright, guess who's back in the game?" You laugh as you run ahead and start taking down the heartless.

Once you strike down two or three, they begin to realize who you are and surround you, twitching as they jump at you, trying to grab your keyblade. As you swing and take them down, it only seems to draw in more and more.

"Where the heck are they all coming from?!" You look around, starting to panic.

"What's wrong, Sora? In a bit over your head?"

The eerie voice pierces your ears. You remembered it from the previous timeline. The voice had come from Frisk, but, it definitely wasn't Frisk. The shadows on one side if you begin to separate and move to the side as a shadowy child stepped forward. It looked almost like Frisk, but there were some significant difference. Like the piercing red eyes to start.

"Where's Frisk?" You ask, pointing your keyblade at them. They stop walking and just smile ear to ear, "What have you done?"

"Frisk is no more. Thanks to the determination in their soul and the strength of their heart, I am now able to take over on my own," the shadow laughed, "You have no idea how amazing it feels to be whole once more."

You clench your fists around the handle and scowl at them, "You won't win, I won't let you!"

"On the contrary," they held a finger up with a devilish smile, "I've already beaten you time and time again. You are weak. Your SOUL power can not match my determination!"

The shadow stepped back, the heartless sinking back into the shadows, "We'll meet again. I promise. For now, it's still too crowded around here."

The shadow laughed as it disappeared, the heartless all vanishing with it. Once everything was quiet, you relaxed your grip and looked around. The few people left in town seemed to be alright, albeit a little injured. One of the bunnies already was tending to the wounds of the others, helping them all into the Inn. You frown and look down at your keyblade. It seemed like all the trouble that normally followed you finally caught up. Only it began so much tougher.

With a sigh, you turn and start to walk north of Snowdin, where you knew the River Person would be waiting. You needed a quick way to Hotland, and that was the best way to do it.

Hotland had become significantly darker since your last trip there. No longer could you see the top of the cave. The heat from the lava below, too, didn't seem as intense. With your keyblade hanging from your back, you kept your focus in the task at hand. You knew what to expect now, you just hoped the others would be willing to listen.

As the lab door slid open and you stepped inside, you were immediately greeting by yelling. Iy didn't sound like arguing so much as just frustration. One voice you recognize to be Undyne's.

"That punk thinks they can just come down here and attack us?! They got another thing coming!" She was pacing, still in her armor though the top and the helmet were sitting by the side.

"U-Undyne, please," Alphys held her hands up where she stood, following Undyne as she packed in front of her, "W-We don't kn-know what were e-even up against."

"I'll tell you what we're up against," a robotic sounding voice came from a box next to Alphys. It had arms coming out of the side that seems free moving as it punched it's own palm, "A dirty little cheater! This human doesn't want to play by the rules."

"H-How can you be so sure, Mettaton?"

"How can you not, darling?"

"It's nothing like that, guys," you heard Sans as he came into the room with them. His expression was more serious than it had been, "And it's not something we can take in our own."

"Sans, how's Papyrus?" Undyne stepped towards him, looking more concerned than she let on.

Sans just nodded once, "He's alright, just a little out of it." He notices you standing there and nods towards you, "Sora. How did it go?"

As you step more into the room, everyone turns to face you. They seem skeptical at first, but you paid it no mind. It was pretty plain to see why they'd think that way.

"Is this the kid you told us about, Sans?" Undyne asked, "Sure doesn't look like much."

"Trust me," Sans said, patting her shoulder as he walked by her over to you. He leaned his arm on your shoulder, "Sora knows exactly what's going on."

Mettaton moves closer to you, the lights flashing exclamation points on his screen, "Well, don't leave us in suspense, darling!"

You look at Sans again and he gives you a thumbs up, letting you stand on your own. You smile and nod, "Here's the plan guys. If we're going to get through this, you need to do exactly as I say, okay?"

Undyne and Alphys exchange a look, then look back at you, "O-Okay, we'll listen."