Apollyon
Apollyon, or Abaddon in some translations, represents the destruction of spiritual truth and good.
In Revelation 9:11, Abaddon also signifies that the falsities of the merely sensuous are from hell, where those dwell who are in merely natural self-intelligence. (Apocalypse Revealed 440, True Christian Religion 310, Doctrine Regarding Sacred Scripture 13) This also signifies reasonings from falsities that seem to be from truths, especially if people mistakenly believed to be wise confirm the reasonings by philosophical considerations wrongly applied, for blind admiration of their wisdom leads to faith in them. (Arcana Coelestia 7643[9])