Harry Potter and Lord of the Rings fans can breathe more easily! The Bible no longer says that Harry and Gandalf must be stoned to death. As Rick Mansfield has noted, the 2007 revision of the English Standard Version (ESV) has reprieved wizards, shifting the death penalty to necromancers.
At least since the time of King James the Old Testament has condemned wizards, most harshly in Leviticus 20:27 (emphasis added in all these quotations):
A man also or a woman that hath a familiar spirit, or that is a wizard, shall surely be put to death: they shall stone them with stones; their blood shall be upon them.
The same punishment was decreed for wizards in the Revised Version, the Revised Standard Version, the New Revised Standard Version (but not the New International Version or Today’s New International Version which use “spiritist”), and most recently the 2001 edition of the ESV, in which this verse reads:
A man or a woman who is a medium or a wizard shall surely be put to death. They shall be stoned with stones; their blood shall be upon them.
But there has recently been released a slightly revised version of ESV. Most of the changes are trivial, but the word “wizard” has been dropped completely, and this verse has been changed to read:
A man or a woman who is a medium or a necromancer shall surely be put to death. They shall be stoned with stones; their blood shall be upon them.
Presumably the translators realised that what God wanted to condemn was not the kindly wonder-workers like Gandalf or Dumbledore, but those, whether wizards like Voldemort and Saruman or ordinary “muggles”, who turn to the forces of darkness to gain power for themselves. As “wizard” no longer has the right meaning, the translators made the wise decision to substitute another much darker term.