Flowey speaks more.
"But all of your FRIENDS' SOULS are gonna be mine, too!"
His expression changes to something mild for a moment.
"Hee hee hee." He laughed. "And you know what the best part is?"
He grins evilly and says.
"It's all your fault."
His expression gets worse again and he says.
"It's all because you MADE THEM love you. All the time you spent listening to them... Encouraging them... Caring about them... Without that, they wouldn't have come here. And now, with their souls and the human's together...I will achieve my REAL FORM. Heh heh. Huh? Why am I still doing this? Don't you get it? This is all just a GAME."
Toriel thinks to herself hearing that.
*What is this nonsense!? This flower is insane! My child, stop them and save everyone!*
Toriel notices for a brief moment, a tall figure in the doorway, she could have sworn they looked like a skeleton. She believes that she imagined it.