It is way beyond the scope of this document to discuss spell usage in detail, but it is the right place to issue a warning. Set into the North Mountain is a 'cave of stars', which contains an object called a 'touchstone'. If you touch this, you stand a chance of becoming a magic-user. However, this chance is VERY low until about level 7. Consequently, DO NOT TOUCH THE TOUCHSTONE until you know an awful lot more about the game! Otherwise, the odds are that your persona will be instantly destroyed.
How do I get to use spells?