The skills used in casting magic spells:

magic defense- The mastery of casting spells that protect people from harm.
heal- The mastery of casting spells that heal the wounded.
magic attack- The mastery of casting spells used in combat.
faith- The mastery of powers gained through one's faith.
conjuring- The mastery of casting spells that create new things in this world.

clerics try to master the spells of healing, protection, and faith
mages try to master the spells of magic attack and conjuring
monks try to master the spells of faith, and gain a degree of mastery over the
	spells of protection and magic attack

See <help spells> for more.