"So what did Toriel mean when she said 'He only needs one more soul'?" You ask.
Flowery spoke, "Well, your the eighth human to fall down here. Six of the souls Asgore has. He needs seven to break the barrier. You're the last-"
"THAT'S IT!" You interrupt, excited. "Remember what she said? 'By killing you and keeping your soul away from Asgore I will prevent all of the other monsters from killing the rest of the human race'. She just wants to save all the other humans! All I have to do is prove I can survive the rest of the monsters without getting killed and she'll let me go!"
"How are you going to do that?"
"I'll fight her until she gives up! That will prove I'm strong enough to survive!"
You pick up a stick and turn it around, inspecting it.
"You're going to fight the fire shooting goat with a stick." Flowery says flatly.
"Yes!" You say.
You walk up to Toriel house and enthusiastically knock on the door. You hear a flustered voice saying, "Oh! I didn't expect company!" Toriel opens up the door.
"Oh. Hello, son and human."
Toriel stared you down with her red eyes.
"Move, mother." Flowery growled right back.
"I'm done running from you." Toriel said shakly. "Hand over the human. NOW!"
"NEVER!" Flowery replied instantly.
Flowery was resisting the urge to bring up a battle sequence, and instead looked at you.
"Give it your best shot,"
You brought up a battle sequence and wasted no time pressing the Fight button.
Toriel gasped, saying, "I thought you were a pacifist!" Then her face hardened. "Bring it on,"
You throw your stick at Toriel. It did one damage.
Toriel laughed.
This was going to be a long battle.
You pick your stick back up and wack Toriel with it. Toriel stopped laughing, and let out a hiss of pain. So that was a little better
Toriel shoots a fireball from her hands, which you dodge. You get in close, wacking the stick over her head a couple of times before she swiped at you. Your arm stung and you watched your health go down to almost half. You grit your teeth and dodged another paw swipe and a few fireballs. You wack Toriel a few more times between dodging fireballs.
Finally, Toriel fell to her knees. Breathing heavily, Toriel waited for you to finish her off. But Toriel wasn't dying without a few last words.
"You will be strong enough to challenge the rest of the underground. Now finish me off, and go to claim the six souls Asgore has from him. Don't worry about me," Toriel laughed. "Knowing that you will prevent Asgore from ever killing all the humans… that is enough for me."
You hold out your hand to help Toriel up.
"Wha.. Wha…" Toriel stutters.
You tell Toriel, "I don't want to kill anyone,"
"You will die, then. But so be it. Maybe you are strong enough to escape the underground without killing. I don't know anymore."
"Goodbye, Toriel," You say.
Flowery, speechless, points you to the ruin's exit. You exit the ruins.