Clever. Verrrryyy clever. You think you're really smart, don't you. In this world, it's kill or be killed. So you were able to play by your own rules. You spared the life of a single person. Froggit, Whimsun. Vegetoid, Loox. Migosp, Moldsmal. Think about those names. Do you think any of those monsters have families? Do you think any of them have friends? Each one of them could have been someone else's Toriel. Selfish brat