Not to disrupt school-days, for I've always thought knowledge was the only goal worth striving for, but one doesn't need to cast Earth Magics to brew potions, one just needs an Earth Spell-book with the proper magical incantations. Now, you needs must be able to understand that mystical scritching, so a grounding in battle-field triage and some higher discourse in the ways of the bodily humours are important, but actually casting the spell is uneccesary. Of course, don't let that discourage you from learning the arcane arts as I'm sure both Arkade Prince and Bart would be exquisite tutors and the world can always use more magic-fingers.
Dramthin Hartsboon
Simple Keeper of the Tainted Grove