Clerics have an ancient belief in not carrying sharp weapons. Hence, they can only wield bludgeoning weapons. This class gives you the wisdom of peace, blessing and healing, though it is possible to learn more violent spells.
This is the class of magic that deals with nature.
This is the class of powerful and violent magic. Also needful cantrips like invisibility or fly can be found here. Their best known class item is the mana wand.
Thieves are known to have very special qualities, that no other class offers. Many of these qualities can come in handy in many situations, such as picking locks.
Warriors are known to have more strength than the average player. This makes them better at hand-to-hand-combat, as they possess skills of violence and fighting unequaled by the members of any other class. However, they lack the ability to use magic of any sort. They will need to subclass in order to learn spells.