Magic, a concept invented in the Middle Ages long ago as a way to explain supernatural events. Nowadays, we know that many of the things they experienced were simply chemical or physical processes, and according to science, everything has an explanation.
If you perform magic nowadays, often you'll be questioned because people are skeptical of this concept. Even if you demonstrate its truth, they'll always believe there's a trick behind it.
If one day magic became real, how would people react? And what would be the change it would bring to society? Besides... what would come with it.
Tell me, if one day you could control magic in exchange for humanity's extinction, would you accept?