Something about all the different types of magic…
So common it’s regarded as completely mundane. Most people know a cantrip or two, and even those who dedicate themselves to other pursuits (fighters and rogues, for example) are likely to pick up a few things here and there.
Very common, and very powerful. It’s seen as a direct channel to forces of nature; a rare few suspect that this is also a direct channel to The Arch Fey.