I am working on a fantasy world with a rich history, but most of it is forgotten by the races that inhabit the planet. This happened because of some kind of magical shockwave that wiped out most humanoids on the planet. What kind of magical effect could it be that specifically targets humanoids?
What are the 'rules'?
- The magic originated from a single point and as a shockwave spread across the planet and the few survivors live mostly on the other side of the planet.
- The magic only affects humanoids, all other animals and plants are unaffected.
- The event is triggered by a demon, but after the event a magician that tried to stop the event gets the blame.
- When you hear what the magic does it should be clear why it only affected humanoids.
Clarification of the question, because it is unclear what I am asking:
As stated before, I want the spell to target all humanoid species. So what could the spell target that really sets humanoids apart from other lifeforms?
Speach/song has been suggested a few times, but animals can also speak. We humans can't understand what a dog barks or a bird sings, but it is their way to communicate. So it has to be something that only humanoids have. I have been searching for differences in the brain between humans and animals, but I couldn't find much information on that subject.