Many people can identify what a witch and a wizard is, but
most cannot describe a warlock. Warlocks are creatures with evil
powers and use them to cast spells on their enemies for fun, and to
disrupt other peoples lives. Or more often, they are males
while witches are females.
Although they love pulling tricks, their enjoyment is in successfully pulling off the spell and seeing the disrupted person,
and not that the world knows they are great pranksters. They are
great pranksters though, because it is impossible to avoid a warlock
or his spells. Unless the idea of living in a cave sounds fine,
there is no way to avoid a warlock. But because they rarely go into
public, not much is written about these powerful, deadly humans.