Warlocks are the most untraditional of the wizardly professions, for in the
truest sense they are not wizards at all.  A warlock receives his powers
from Yed, the great lord of the elemental planes and all warlocks must
pledge their powers to his service.  Warlocks wield great destructive
power, but are often as great a danger to their friends as they are to
their enemies.