Ah, we’ve gotten to the color/weapon system. This thing is so weird, and all the charts I found for it are so weird, because it doesn’t play out balanced, Silver is different than the rest, and they don’t quite create an easy to understand set of relationship.
Anyhow, in Skies of Arcadia Legends Guide and Walkthrough by Ins1ghtful it notes:
o Learn Green magic first. The majority of the spells learned from other colors
are offensive in nature, and your spirit points are better used for other
purposes.
Fortunately Clover wants to do that first (e likes the color!), so I’m fine letting em go for it. Eventually we will learn when a color is very not productive, but in the meantime: unlock the green healing magic!
Oh yeah, you get magic XP based on the color of the weapons in the party, and it is a separate powers track of unlocks, specifically “magic” spells, of which there are six for each color, meaning 36 in all.