Flame Weapon Reagents?

[Egon the Monkey]

Like summoning reagents but for Flame Weapon/Darkfire. Ichor for acid damage, icedust for cold damage, that sort of thing. It would allow tailoring of the spell to get around creature immunities etc.

[BrittanyPanthas]

This can already be earned in game by mages.  Whether the theme is switchable at will is something that I don't know.

[Egon the Monkey]

I know it can be asked for at creation or after, but it's not switchable, it represents a PC choice to focus on that sort of power (like a summon theme). That's why I suggested this as an idea.