Undyne stares at you as you come to a halt on the bridge. It's a dead end. With her glowing blue spear in hand, she slowly makes her way to you. When close enough, she points it outwards, not touching you but extremely close. She takes her helmet off with her other hand. You.. she mutters. You have what we need. Seven souls to break the barrier, and then we can all go home. Human... you are the seventh to fall. We have six.

So heed my words...

Give me your soul, or I will rip it from you myself.