Undyne and Frisk both slowly begin to move away from the voice. Its source is near impossible to see in the darkness. Undyne readies a spear, hands shaking. The voice echoes out again though none of them are able to understand. It's only two words this time, but those two words have even Undyne horrified. She throws the spear into the darkness, but it misses its mark. The same voice echoes back to them, the same utterance, the same two words, again and again and again… Each time growing louder and deeper and more distorted as Undyne readies yet another spear and Frisk tries frantically to pull her away from the source of that awful sound.

I tear my eyes away from them just long enough to decode what this thing is saying to them, what words it is now bellowing through the darkness, what words they don't entirely understand, but can sense just enough of, to fill them all with unbridled terror.

"Bad. Idea."

Frisk pulls on Undyne's spear. While she normally would have fought back, she can't tell at all where this thing is. She does what is possibly the only even mildly heroic action she can in that moment.

She grabs Frisk, throws them over her shoulder, and runs. Frisk has a death grip on Flowey's pot as Undyne hurtles through the darkness with them. She can't know where she's trying to take them, but in that moment anywhere is better than where they are. The voice is saying new words now. They seem to be coming from everywhere, all around them as they frantically try to escape.

Undyne's armor weighs her down, her breathing can be heard, labored and heavy as she sprints away from the terrors behind her as quickly as she can. In a blinding moment the scenery of Hotland flashes around them, along with, apparently, the heat of Hotland. She stumbles, holding her chest, moments before the scenery flickers back into absolute darkness. The voice grows louder, approaching them.

"It's going to kill us… We're going to die," Flowey whimpers.

Undyne takes a shaky breath and forces herself to stand. "No, not today." She summons another spear and faces down the darkness. "You won't get past me!" she yells into the void.

There is an odd chattering sound in the inky depths. Discernible voices begin to ring out. "Come... join the fun…" they say. They repeat themselves, out of sync with one another as they grow closer. The shapes grow apparent, or at least, if you could call the amorphous and terrifying beings that were now growing closer 'shapes,' they were growing apparent. They resembled nothing. Their twisted bodies didn't seem to consist of bodies at all, but rather vague approximations of disembodied heads, with none of the features where they should be, and constantly shifting around.

Undyne stands ready as a barrage of Memory Heads launch themselves at her. She bats them away from her with her spear. "Kid, get out of here," she says quickly to Frisk as another one tries to attack her.

Okay. *No way!

Frisk stands their ground. Undyne glares. "I said to go! I'll catch up with you." She waits for Frisk to run then winces as she narrowly blocks a Memory Head. "I'm still after your soul you know, get moving now or I will take it!" she threatens.

Frisk listens this time, running away from her as Undyne continues to fight off the twisted horrors. But then something odd happens. Some of them leave Undyne behind entirely, instead chasing after Frisk and Flowey. Flowey is the first to notice that more and more of them are chasing them and not Undyne. "They're catching up," he says.

"Frick," Undyne mutters, and chases after them as well, batting the occasional one away from Frisk and Flowey's path as she tries to return to them. Meanwhile, they are becoming quickly overwhelmed. Everytime some of them become close enough to start a confrontation, Frisk flees. But it's becoming apparent that this tactic will not work for much longer. They surround Frisk, some of them cutting off their path entirely as the twisted heads continuously chatter.

"Come join the fun… come join the fun…"

Theyre forming a circle now, and there are far too many for Frisk to even hope of trying to fend off. They back away from some that move forward, but quickly realize they're just walking towards more. They cover their eyes.

Undyne catches up, leaping to the center of the circle of Memory Heads. She's still breathing hard. "Kid… you really are a magnet for trouble, aren't you?" She asks as she faces down the strange monsters.

The scenery suddenly flickers through several places… Snowdin, Hotland, the lab, Hotland again, Snowdin again… Undyne stands tall as she looks around, but the sudden flashes of heat and cold are obviously causing her suffering. "Theyre not there when it isn't dark!" Flowey points out. Undyne nods and grabs the two of them again.

She races through the shifting scenery, over the hot air vents of Hotland, through the wind and blizards of the Snowdin woods, skillfully getting around obstacles of the other areas in the underground, and around the Memory Heads every time they're plunged back into darkness.

Finally, the flickering scenery slows- each time, the amount of time they spend in each area growing lengthier. She looks around for any more enemies but they seem to be alone now. She slows, staggering, barely able to hold Frisk up. She drops them, only able to stay standing now by propping herself up with a spear. The distorted voice rings out, though it's distant.

"K...Keep moving," Undyne tells Frisk as they stagger away from the approaching voice.

Suddenly, they stumble out of the darkness, each of them falling forward, Undyne still holding her spear tight and clutching her chest. It's not completely light around them, but the gentle glow of mushrooms and false stars above them let them know that at least, for the time being, they are safe within the caverns. They lie still, catching their breath from the ordeal. Undyne closes her eyes, apparently recovering from the wildly fluctuating temperatures within the darkness.

"It's… gone…" she says eventually, before sitting up to look around. She sees a nearby stream of water and goes to it, cupping it in her hands and drinking deeply from it, before pouring some over herself. When she's sufficiently rehydrated, she moves back over to Frisk, who still looks like they might be in shock over what just happened. Undyne hesitates, then helps them sit up. "It looks like we're back near Waterfall," she tells them.

Flowey nods, looking up at the false stars of the cavern. "That… that was terrible"

Undyne looks sympathetic for a moment before regaining her normal composure. "Yeah well, buck up, buttercup," she tells Flowey. He makes a face halfway between a scowl and grimace. "We need to figure out what that was."

"We?" Flowey asks.

"Yeah 'we.' I don't know where you two are from but… those things. They went after you specifically. You're involved in this somehow. And as a member of the royal guard, it is my duty to put an end to anything that can threaten the safety of my people." She stands and pull's Frisk to their feet completely. "So for the time being… I will… bleh… spare the two of you. But you are under arrest. And you're coming with me.

You (are forced to) join Undyne's party!

"With you where?" Flowey asks.

"Unfortunately Hotland," Undyne says. "If anyone can help with this, it's Alphys. But first, my house… here, I know a short cut." She starts to walk there down a tunnel that Frisk and Flowey had apparently missed, and they quickly follow. The end of the tunnel leads them to an oddly fishy house. "Wait here," Undyne says as she goes in. After a few moments she exits it without her armor. "Can't stand to be in Hotland for five minutes with that stuff… Ugh, why does the lab have to be somewhere so… so…"

"Hot?" Flowey supplied. "Think that might be why it's called, oh I don't know… Hotland?"

"Yeah, yeah, shut up, marigold," she mutters as she walks from her home down to The River-person. "Hey boat dude, can you take us to Hotland?" she asks, climbing in.

The River-person nods and allows Frisk in after her before rowing them towards Hotland. They began to quietly hum to themselves for a few minutes before speaking to them. "Hm hm hmmm… You've seen him, haven't you?" The River-person asks. "You've seen the man...The Man Who Speaks In Hands… he knows you now. You best beware."

AN: I read a theory somewhere that the Memory heads aren't actually amalgamates since they don't contain any obvious parts from any known monsters, and their act command to defeat them is pretty unique too, and it kind of just stuck in my head. They kind of remind me of giygas though.