It had been only minuets since Frisk departed the caverns with the waterfalls and the echoing flowers. He was now close to what he could only guess to be Hotland, the location where the kings castle was located. It looked like a mechanical city. All that stood between him Hotland, was one last tunnel carving through a tiny mountain range. However, as he approached the tunnel, he spotted the gleam of armor, and looked up to see Undyne staring down at him.
"Seven. Seven human souls, and King Asgore will become a god…six. That's how many we have collected so far. Understand? Through your seventh and final soul, this world will be transformed. Undyne removed the helmet. Frisk was greeted with a blue, almost piranha-like face.
"YOU! YOU are standing in the way of EVERYONE'S hopes and dreams! Alphy's history books made me think humans were compassionate…but YOU?! You're just a remorseless criminal!"
Frisk shouted back, now defiant. "What do you mean?! I saved a kids LIFE!"
"Yes…but meanwhile you have wandered through the caverns, attacking ANYONE in your path!" Frisk looked to his feet. He did remember the several small more feral creatures he had encountered. Some he fled from. Some he spared. But other more…persistent creatures, he was forced to kill. He had convinced himself it was self-defense.
"Oh come on, they didn't give me a CHOICE!" Frisk shouted up.
"Self-defense? Please. You didn't kill them because you had to, you did it because it was easy for you. Your time is UP villain! Every hope, every DREAM you've turned to dust…I'll send RIGHT back to you through my spear!" Undyne jumped from the top and landed in front of Frisk.
"However, as captain of the royal guard…I do believe in honor, and a fair fight." Undyne materialized a shield in one hand and tossed it to Frisk. Frisk scrambled to pick it up and face the captain of the guard, who yelled. "EN GARDE!"
Immediately Undyne charged Frisk, spear in one hand. At the last second, Frisk threw his shield up, managing to deflect the spear away from him. He took out his knife in his other hand.
"For years, I've dreamed of this…" He heard Undyne sneer. "And now, the sun is JUST within our reach!" Frisk advanced and lashed out with the knife. Undyne blocked the attack with the spear, and Frisk managed to just barely put the shield up to block a second blow. Frisk attacked again, but the knife only glanced off her armor.
"You're tougher than I thought human…but even if you COULD beat me…NO human has left the underground alive. Asgore always makes sure of that." Frisk, still unsteady from his last blow, was caught off guard when Undyne drilled the blunt end of a spear against his side, knocking him to one knee. HE just managed to put the shield up, the spear slamming into it. The blow sent Frisk reeling, and he somersaulted backwards onto his feet. Frisk knew that he couldn't give himself up to Undyne or Asgore, however it seemed like Undyne was prepared to fight to the death. There was only one way this could end. He searched the armor for any weak spots. He dove forward as a spear flew over his head, managing to get closer…there! A small gap, large enough for his knife to fit through between the chest-plates.
"DIE ALREADY YOU LITTLE BRAT!" Undyne screamed furiously as she kept lunging again, and again. Frisk grunted and then yelped in pain as one of his blocks was off, and the spear nicked his arm. He stepped back and glanced at the fresh wound, bleeding slightly. It wasn't serious. When Frisk attacked, he focused his strike on the gap in the armor. However, he was just off. His knife struck the plating instead, and he just barely had time to get the shield back up for a flurry of blows that sent him reeling. When he managed to strike again, the knife struck home, hitting the plates enough that it would be noticeable. The blow set Undyne off balance as she tried to counted. Frisk managed to deflect the spear into the ground, then drove the knife through the gap in the plates, cutting deep along Undyne's chest. Undyne dropped to her knees a moment later.
"Nggaahhh…you were…stronger…than I anticipated…so then…this is where it ends…" Frisk stepped back, blood dripping from his knife as more began to drip to the ground beneath Undyne. Suddenly, Undyne groaned.
"No…NO! I WON'T die! EVERYONE is counting on me to protect them! In the name of everybody's hopes and dreams…I WILL KILL YOU!" Frisk found a tear welling up in his eye, knowing what he had to do. As it slid down, Frisk lashed out again, the knife cutting across Undyne's cheek as she stood up.
"IS THAT ALL YOU GOT?!" Undyne lashed out again, and Frisk struggled to block the attacks, the tears making it hard for him to see. He could see her body beginning to waver. Her movements were slower. Frisk slashed at the gap in the armor again, sending fresh blood onto the knife. Undyne doubled over and stumbled back, but she managed to stand. Her movements were slower still, and Frisk only had to sidestep to avoid her next attack. She groaned as her wounds began to catch up.
"…I won't…give up…" Frisk, wanting this to finally end, gave one final strike across her heart. Undyne once more stumbled, and collapsed.
"…Alphys…this is what I was afraid of…this is why I never told you…" Undyne began to slowly…melt…before turning to dust. Frisk dropped to his knees, the blood-stained knife and shield clattering to the ground with him. His breath was shaky as he tried to compose himself, staring at his hands. He whipped them off on the stones, then left the shield behind. He picked up the knife, terrified at what he thought he was becoming. He too cleaned the blade, before pocketing it, and moving through the mountain range, into Hotland.