Demons

The evil spirit that troubled Saul (I Samuel 16:14 et seq.) may have been a demon, though the Masoretic text suggests the spirit was sent by God.

Some benevolent shedim were used in kabbalistic ceremonies (as with the golem of Rabbi Yehuda Loevy), and malevolent shedim (mazikin, from the root meaning to damage) are often responsible in instances of possession. Instances of idol worship were often the result of a shed inhabiting an otherwise worthless statue;[citation needed] the shed would pretend to be a God with the power to send pestilence, although such events were not actually under his control.