How does magic work, in (21th century) scientific terms?
In short, the official rules do not contain any justification for the physics of magic on Hârn. It is not truly necessary to have such a justification in a fantasy role-playing game, as long as the magic rules are internally consistent.. However, some players and gamemasters feel more comfortable or find it interesting to develop rational theories of the physics of magic. The HârnPage contains a couple expositions on the subject. More are always welcome.