If you hadn't noticed the pattern by now, all spells for your school are completely and utterly free. If you are Fire school, then all Fire spells are free. If you are Life, all Life spells are free, and so on.
Moolinda Wu is your main teacher. However, there are multiple hidden trainers around the Spiral - in Wizard City alone, there is one in plain sight in the Fairegrounds, and one more hiding in Colossus Boulevard. Look everywhere! Some are even hiding in dungeons!
