Not to mention that if you look at it, magic is not exclusive to Sorceress' as much as it's the scale of the power. Galbadian soldiers can use limited magic, the whole process of drawing spells comes from removing magic potential from the world around you.

I would argue that magic is not exclusive to the Sorceress though it's obvious that the Sorceress power is on a much greater scale, and she has access to abilities that are not possible through Junction, such as physical manifestations of immaterial substance and making inanimate objects into living beings.

I'm more curious about Ellone's plot device powers.