3. The Minions of Sitra Akhra. Sitra Akhra could be translated "the other side".
Some philosophers believed that all things were created by and subject to God (including demons),
but others wondered if the things which were so unspeakably evil had
their origins in another realm outside of God's command, or at least
if there was a place forsaken by God, or where the inhabitants had no respect for God at all.
This produced the idea of Sitra Akhra, which I suppose is the closest
I've seen to a classical Hell in the Christian sense, where the inhabitants are purely evil
and have completely forsaken God, existing only to satisfy their perverted whims. The demon Samael
(who is often equated with Satan) is sometimes said to live here.
Anything from Sitra Akhra would be completely evil, malevolent, and very dangerous.