fairy
Explanation
This comic subverts the classic fairy tale trope of a magical fairy visiting a child. A girl exclaims "Oh! A fairy!" but the fairy immediately delivers a string of bad news: "Yes, but unfortunately I'm a traditional sort of folklore fairy. I'm gonna take your soul to pay a tithe to hell."
The fairy then continues listing the terrible things it will do: "Then I'm gonna steal your child" and "Also you're pregnant and the baby will be a gnome or something."
The humor comes from the contrast between the modern, sanitized Disney version of fairies — cute, sparkly, wish-granting creatures — and the actual fairies of traditional European folklore, which were often depicted as dangerous, capricious beings who kidnapped children (changelings), stole souls, and made dark bargains with humans. The comic is a reminder that many beloved fairy tale creatures were originally quite sinister, and that "fairy tales" in their original form were more horror stories than bedtime stories.