Where does magic come from?
I know the World Runes have something to do with magic, but do they seep magic and that's how everything in Runeterra becomes magical? Are there any canon rules for what magic is, where it is, and how it works?
For example, I was trying to figure out how Brand's Pillar of Flames would work in the universe of LoL. I figured he'd make an explosion in a certain area near him, but how did that explosion happen? Did he ignite the air? Manipulate the magic in the air to combust? Or did the fire leave his body?
So yeah, what is magic?