The Shaman subclass can be unlocked by using a Tome of Mastery after defeating the second boss (Tengu).
Elven _Shamans_ can use wands as melee weapons. Successful hits have a 25% chance to activate the wand's power on a target without using a charge.
Using an Armor Kit on any armor will transform it into the Shaman Armor, which is specifically designed for this subclass.